Chemistry Questions and Answers June 09, 2020

What is the unknown compound and explain?

8 A 4000 3500 3000 250 2000 1500 1000 WAVENUMBER cm1 1H (s) 5H (m) 2 H (d)

Cite the difference and similarities of the types of polymers using a Table. Topic POLYMERS Type 3 Organic Type 4 Inorganic Table 1 Type 1 Type 2 Natural Synthetic Difference ,Similarities

Directions Illustrate Carbon using any of the functional structure group. Draw your answer on a separate sheet of paper.

Illustrate the Ionic Bonding of the given compounds.

CaBr2 KCI

A student prepared a dilute solution of polyisobutylene having a molecular weight of 140,000 gmole in a theta solvent at 25 C. Lets assume that the polymer has a coiled spherical shape, and that the RMS endto end distance can be an approximation of the diameter of the sphere. Calculate the volume occupied by the polymer. CC bond length 1.54

3. What is the main reason that DC Polarography cannot be used for quantitative analyses of solutions diluted more than about 5.0x106 M and how was this limitation circumvented 4. What will be the concentration of nickel(II) ions in a titration of 25.0 mL and 0.020 M nickel (II) solution at pH 8 if equivalent amount of 0.040 M EDTA is used in this

6. Predict the numbers of signals, integration ratios, and splitting pattems of the following compounds in the HNMR and CNMR spectra. (12 pts) Compounds HNMR CNMR CH,IOCH CCH3 CH .Br b)

3TC (shown below) is obviously safe for human use but it turns out that the enantiomer of 3TC (ent3TC) is toxic to humans. This is due to the fact that it interferes with human DNA synthesis as ent3TC very closely mimics deoxycytidine. Draw the chemical structure of ent3TC. H2N. N OH Lamivudine (3TC)

In a volumetric analysis experiment, a solution of sodium oxalate (Na2C204) in acidic solution is titrated with a solution of potassium permanganate (KMN04) according to the following balanced chemical equation 2KMN04(aq) 8H2SO4(aq) 5N22C204(aq)2MNS04(aq) 8H20() 10CO2(g) 5N22S04(aq) K2S04(aq) It required 40.0 mL of 0.0335 M KMN04 to reach

Considering the dilution made, calculate the mass in grams of each anion in a 2L jug for the original unknown well water sample. Show one sample calculation for NO in sample 1. Record your calculated results in a new table. regression equation y 1767x 20034 volume of unknown well water sample in sample 1 2.000mL in 50.00mL volumetric flask

5. Based on the quasichemical model and the phase diagram shown in Fig. 2, (1) Draw the free energy curves of all phases (the phases are for you to identify) for T 90, 65, and 20 C. (2) Is AHmix (solid) 0 or 0 Explain. (3) Calculate ASmix for XB 0.5 at 90 and 20 C. (10) B 100 Liquid () 1A 60 40 14B 20 BAB N. AB Mole fraction of B, x Fig. 1 Fig.

For the given chemical reaction (S5 ZnSo, LizCO, ZnCO, L2SO4 The five components are ZnZinc CCarbon OOxygen SSulphur LiLithium a) Model a system of equotion and apply consstency criteria for existence of solution b) Apply Gauss elimination method to get the balanced egtuotions.

Which of the following is not an advantage of HPLC over GC A more versatile in adjusting separation parameters B cost of High Performance Liquid Chromatography systems applicable to wider range of analytes providing a high degree of selectivity for specific analyses (E) Adsorption, partition, ion exchange and exclusion modes are available

After the reflux step, the reaction is allowed to cool and the product separates out from the aqueous layer and is observed as the more dense layer. Group of answer choices True False

Calculate the mean free path for the composition of 20PBO30SiO250B2O3 at the photon energy of 0.1 MeV(the density is 5.3 gcm) O a. 1.006 cm O b. 1.025 cm . 0.077 m d. 0.9 cm . 0.096 cm

mn 0.59 V, E, 3.04 V I) Calculate AG (kJmol) for the following electrochemical cell II) If the cell emf of a LiMnO, cell is 3.64 V when the concentration of Li is 0.5 M, what is the concentration of Mno, Li(S) LI(aq)(0.5 M) MnO, (aq)( M) MnO,(s) O AG 709 kjmol, MnO 0.6 M O AG 709 kjmol, Mno, 0.4 M O AG 1051 kjmol, Mno, 0.6 M O AG 1051

Sketch the expected charge versus pH curve for humic substances. How does this differ from a pure compound with one functional group such as acetic acid? You should make reference to the key functional groups responsible for the charge.

The current exchange rate is W (Korean Won)950 per 1. Ewha corp. is a Korean exporting company and is scheduled to receive US dollars in a year. It considers a contract with Zi bank to hedge the foreign exchange risk. Let S denote W per 1 in a year. In the contract, if 900 ( S ( 950, Ewha can sell the hedged amount of dollars for W950 per 1 to the

At 88.2 K, Ne occupies 12.74 liters at a pressure of 0.606 atm. Calculate the pressure, temperature and volume for Ar if it is found in the same corresponding state as Ne. Critical constants Ar Pc 47.7 atm Pc 25.9 atm Te 151.15 K Vc 0.0752 Lmol Ve 0.0417 Lmol Ne Te 44.45 K For the toolbar, press ALTF10 (PC) or ALTFNF10 (Mac). BIUS Paragraph

A surfactant mixture having an HLB number of 8 should give a good WO emulsion in which the oil phase is lanolin. Suggest two possible surfactant mixtures that you, an aspiring cosmetic chemist, might use you have been told that your formulations must contain 10 cetyl alcohol.

Identify the structures of both unknowns based on the HNMR and IR spectrum?

Liquid 31 L00 3000 1000 AVENUBERI 11 10 7 6. 4 2 1. ppm 3M

Use the Born-Haber cycle and given data Hf(CsCl)=438.0kJ/molHf(CsCl)=438.0kJ/mol, IE1(Cs)=376kJ/molIE1(Cs)=376kJ/mol, sublimation energy Hsub(Cs)=78.0kJ/molHsub(Cs)=78.0kJ/mol, the bond energy of Cl2(g)Cl2(g) is 243 kJ/molkJ/mol, EA(Cl)=349kJ/molEA(Cl)=349kJ/mol to calculate the lattice energy of CsCl Express the lattice energy with the

A graduated cylinder contains 145 mL of water. A 12.0 g piece of iron (density= 7.86g/cm^3) and a 24.0 g piece of lead (density= 11.3g/cm^3) are added. What is the new water level, in millimeters, in the cylinder?

In a certain free radical polymerization initiated by BPO, a kind of thermo decomposition initiator, it is found that the final molecular weight of the polymer is lower than expected. Based on the polymerization mechanism and molecular weight related equations (Mayo Equation), discuss how to decrease the molecular weight. At least 3 different

5.00ml of 2.00x10 M Fe(NO,) are mixed with 2.00mL of 2.00x10M KSCN and 3.00ml. of distilled water are added. The concentration of FeSCN is determined spectrophotometrically and found to be 5.07x10 M. Determine the equilibrium constant Kc of the above reaction.

When a binary alloy AB, containing Xa mol of A and XB mol of B (XA XB 1), is formed, below phase diagram with three different solid phases (a, B, y) could be obtained. Please draw the detailed Gibbs free energy vs. Xg graph at the specific temperatures (green lines), and explain it L T2 T3 T4 T5 A Windows Wi Temperature

Why at night we only see objects if we irradiate them with light, while the bulb of a bulb emits light by itself (without the need to be irradiated with light)?

Why are polymers important

theoleian Molar air fuer (atio for Combustion OF calcviate Cyclohexane ASSUMiag Pladucts ale Nz Hzo Co2

Which motion is shown in the following figure Particle in a Box Particle in a two dimantinal Box Particle in a three dimantinal Box Harmonic Oscillator O O O D

Find out the normal boiling point of substance A in C using the following data A(liquid) AH, 12.00 kJmol and S221.9 JK mol A() Ag) A(gas) AH 49.9 kJmol and S320.6 JK mol Answer C

Name this molecule by ANY one of the three conventions. This is a stereoisomer, so remember proper designations (2 pts) CH3CH,CH CH,CH3

Complete the following conversion HNO3 A H,SO, AlC3 Zn(Hg) HCI KMNO4 (hot concd.) Br2 hv NH2 NH3 H. (cess) NaOCH3 F Show how you would synthesize the following compounds, using the indicated starting materials. CH3CHOCH3 (a) from anisole CH3 CH2CN from benzene (b) NO, (c) 3phenylbutan1ol from styrene B.

Draw Fischer projection for (R)-2-bromobutan-1-ol.

Calculate the conditional potential of FeFe2 in EDTA solution. The pH of the solution was 3.00 controlled by buffer solution, and the concentration of uncoordinated EDTA was 0.10 molL. (E FeiFe20.771 Fe3EDTA stability constant K1.26 X1025 Fe2EDTA stability constant K,2.09X1014 ayan3.003.98 X 1010). Initial concentration of Fe ions is 0.1M

3. Using H C O as a example to plot the MO energy diagram. Draw and define the possible 3 transitions and write down the changes in their electron configurations. R(10)

Complete the following conversion HNO3 A H,SO, AlC3 Zn(Hg) HCI KMNO4 (hot concd.) Br2 hv NH2 NH3 H. (cess) NaOCH3 F Show how you would synthesize the following compounds, using the indicated starting materials. CH3CHOCH3 (a) from anisole CH3 CH2CN from benzene (b) NO, (c) 3phenylbutan1ol from styrene B.

What is the difference between the reactant (9-anthraldehyde) and the product in this C13 NMR?

A 9anthraldehyde13C.pdf (1 page) A Wittig 13C.pdf (1 page) Search Q Search 190 180 170 160 150 140 130 ppm 140 138 136 134 132 130 128 126 124 ppm 6 D0 TET

3. One method for synthesizing polypeptide chains is through the use of the Merrifield resin synthesis. () Write the complete synthetic route for the synthesis of the tripeptide LphenylalanineLselenocysteinelasparagine (FUN) using this method. You do not need to show any mechanisms, but you must (in show all synthetic intermediates. To reduce the

Gas chromatography (GC) and liquid chromatography (LC) are both highly important methods for the analysis and separation of complex mixtures. Which of the following statements is not correct Select one a All three of the options listed b. Flame ionisation, FTIR and mass spectrometer are suitable detectors for both GC and LC measurements. c. GC is

A solution of weak monoprotic acid is prepared, and its pH is measured to be 4.0. A sample of this acid is titrated with soluton of sodum hydroxide of the same concentration as the acid. For this titration, a perfectly chosen indicator is used, ie pH (equivalence poiti Determine the concentration of the acid if this indicator is Phenol Red The

3. Three aspirin tablets (300mg) weighing respectively 0.325g 0.318g and 0.339g were crushed. How much tablet powder need to weighed to have 250 mg of active ingredient available to prepare a acetylsalicylic acid solution 4. A sanitization solution that contains 275 g of isopropyl alcohol in 500 g of solution which has a density of 0.857gml.

A 10.0-mL sample of potassium iodide solution was analyzed by adding an excess of silver nitrate solution to produce silver iodide crystals, ( which were filtered out of the solution) and potassium nitrate. If 2.290 grams of silver nitrate were obtained what is the molarity of the original potassium iodide?

Specify the reagents that can be used to perform the transformations given below

OH Br MgBr B COOH

consider a nickel plate that is in contact with oxygen gas at 345 K and 450 kPa. Determine the molar and mass density of oxygen in the nickel at the interface. (The right answer 15 P, the solution 10 P)

Calculate the pH of the following solution. All concentrations are 0.0100 M. The k of Acetic acid, HC,H,O, is 1.80x10. If more than one chemical is included in the solution, remember to calculate the concentration of chemicals after mixing prior to creating your chemical inventory. Prepare a complete chemical inventory. Type your numerical

5. Knowing that the concentration of Ag in a silver chromate solution,Ag2CrO4(aq), is 1.5 x 103 molL, calculate its solubility product constant (Ksp) at 25C. 8. a lf OH in a solution is 104 molL, what is H b. If 1500 ml of water is added to 500 mL of this solution, what will H and OH be 9. According to Arrhenius, which of the following groups

For the following structure give:generic name,chemical name,therapeutic group and chemical group

CM3

Imagine that we encounter an alternate universe in which the spin quantum number m, can have values of m, , 0, and . If all other quantum numbers behave the same, if the Pauli Principle and Hunds Rule remain the same, and if this universe follows a similar pattern for filling orbitals from lowest to highest energy with electrons a) Draw the

1) Draw the molecular orbital energy diagram of the Fe(CO), (virtual compound) compound with the D3 point group. 2) Predict what representation the HOMO and HOMO of the above compound will have. D3h E 2C, 3C, 2S, 30y A, x y, z 1 1 1 1 1 1 A, 1 1 1 1 1 1 R. E (x, y) (r y, xy) 2 1 2 1 A, 1 1 1 1 1 A, 1 1 1 1 1 1 E 1 2 1 (R, R,) (xz , yz)

Write the formula of the conjugate base of the BrnstedLowry acid,

A thunderstorm had a precipitation rate of 140 mm/hour and a radius of 9 km, how long does the thunderstorm need to last, in order for the energy released in the thunderstorm to equal the annual electricity consumption of Tasmania? Latent heat of fusion for water = 334 kJ/kg Density of water = 997 kgm-3 Annual electricity consumption of Tasmania =

(b) A pipette is calibrated to deliver 10.00 mL of water. i) Discuss the possible error if this pipette was used to deliver mercury. Given the density of water and mercury are 0.9982 and 13.543 gcm at room temperature, respectively. ii) Conventionally, volumes of all glassware are expressed at 20 C. The expansion coefficient glass is 0.0025 per C.

Are the crystals isolated lidocaine freebase or the hydrochloride salt (LidocaineHCI OA Lidocaine freebas OB. Lidocaine hydrochloride C. Both A and B OD. Trick question, no crystals were isolated, product is a liquid.

What is the average of the following 3 numbers 22.59, 27.43, 35.64 (provide answer with 4 significant figures) QUESTION 19 In an experiment, you expect to produce 0.0150 mol of AgCl. The actual yield was L.68 g AgCl. What is the percent yield (provide answer with 3 significant figures)

Complete the table.

Temperature Trial 1 Trial 2 Trial 3 Concentration of iodide solution (mM) 100.0 100.0 100.0 Concentration of thiosulfate solution (mM) 20.1 20.1 20.1 Concentration of hydrogen peroxide solution (mM) 176.0 176.0 176.0 Temperature of lodide solution (C) 4.6 Volume of iodide solution (1) used (mL) 10.0 Volume of thiosulfate solution (S20,2) used (mL)

Solution A consists of a 0 20 M aqueous solution of formie acid, HCOOH, at 25 C. Caleulate the pH of Solution A. The pk, of HCOOH is 3.75. Answer. At 25 C, 1.00 L of Solution B consists of 13.6 g of sodium formate, NAHCO,. dissolved in water. Caleulate the pH of Solution B. Answer.

Calculate the pH at each of the following points for the titration of 75 mL of 0.80 M dlHistidine with the following volumes of 1.20 M sodium hydroxide. H3His H H2His Ka1 3.98x103 H2His H HHis2 Ka2 9.12x107 HHis2 H His3 Ka3 4.67x1010 Vol. of NaOH Calculated pH O mL 30 mL 50 mL 75 mL 100 mL 125 mL ,135 mL 150 mL 175 mL Please provide a

Furan is oxidized by bromine in ethanol to give 2,5 dihydro, but when oxidized by potassium permanganate, what does it give?

Nitric oxide is made feom the oxidation of ammonia 4NH3+5O2 (g) -> 4NO(g) +6H20(g) what mass of nitric ocide (MM 30 g/mol) can be made from the reaction of 36.51 g NH3 (MM 17.00g/mol) with 49.41 g O2 (MM 32.00 g/m)?

A) Determine Activation energy using The Arrhenius Equation: k=Ae^-Ea/RT use Rate Law to help solve for k. Rate Law=k[I-][H2O2] B) Use info above to create a 6 plot include a trend line

Activation Energy Data Solution 0.300 M 0.0200 M D.I. 0.1 M Buffer Starch Blue Temp. number KI NazS,03 Water H2O2 (mL) (mL) (mL) (mL) (mL) (mL) (s) C 5.00 6.00 2.40 5.00 15.60 6.00 172 40 12 5.00 4.00 2.40 5.00 17.60 6.00 100 40 3 5.00 2.00 2.40 5.00 19.60 6.00 167 30 4 5.00 4.00 2.40 5.00 17.60 6.00 128 30 5 5.00 6.00 2.40 5.00 11.60 10.00 687

Marshall Junior was born on August 1 of this year. Current college costs are about $20,000 per year and rising at about 5% annually. 1. How much will college cost Marshall Jr's Freshman Year, which will be paid for in 18 years (ie. What will ONLY the freshman year cost). Hint what are the FUTURE costs of college? 2. How much will the total costs

Identify each equipment or technique and in a sentence define its use

per QUE water t rentie ANI

Is ethyl chloride have a higher molecular dipole moment than ethyl iodide? Explain your reasoning.

Calculate Equilibrium concentration.

Calcubate Equilibrum Concentration y4576X AbEsbCd Temprutore 22c o.00200Mb.00200M Test Tube Fe3t SCN HzO Absabance 4.90 1.99 3.98 0.14 mi 2. 4.99 3.ol ml 2.0 D189 me 6.05 510 ml 1.01 0.278 3 6.10 6.02 m2 0.346 ml.

What is the ratio of weights of populations for even and odd J due to the effects of nuclear statistics for C, For 13c, l What is the ratio of weights of populations for even and odd J due to the effects of nuclear statistics for 12cS2 What effect would be observed when 12c is replaced by 13c ( 12c) 1 ( 325) 0. 3

To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 2.40 mol of gas D measured at 251 CC in a 1.75-L container assuming ideal behavior ? To prevent tank rupture during deep-space travel, an engineering team is studying the effect of

The pictures below show two liquids used in an experiment similar to Introduction to Measurement. Based on the pictures, and knowing that the mass of the empty cylinder is 80.6g, complete the table below 40 30 20 10 pivot Interactives ,50 40 30 20 10 A Pivot Interactives sample mass of liquid (g) volume of liquid (mL) density to the liquid (gmL

A pharmacist needs to prepare an extemporaneous solution of a 2% (w/V) antibiotic (weak acid) for a given patient. At what pH should this drug be in solution to be soluble at the desired concentration? Info: PM (acid) = 263; MW (sodium salt) = 285 Solubility in acid form = 3.1 mg / ml; Ka = 5.86 x 10-6

If an equilibrium mixture contains 0.41 M CO and 0.18 M H2, what is the molar concentration of CH3 OH Express your answer to two significant figures and include the appropriate units. A (CH OH Value Units

Problem 2 (20 points). The mass spectrum of a molecule is shown below. Assuming the molecule could only contain C, H N, O, CI, and Br, generate all possible formulas and calculate double bond equivalencies for each formula. 100 80 60 173 40 20 0mtrmrmt 25 50 75 100 125 150 175 mz Relative Intensity

Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, with a melting point of 136 C (277 F), and a boiling point of 140 C (284 F).24 Its acid dissociation constant (pK.) is 3.5 at 25 C (77 F) (0) With reference to electron withdrawing and releasing group effects explain why Aspirin is stronger acid than

Calculate the (H and the pH of a solution with an JOH 43 x 1010 Mat 25 C. 3D 1.62 x1013 M. pH 4.79 Calculate the H and the OH of a solution with a pH 230 at 25 C. 105 x101 M

(a) The absorption spectrum of the HCL molecule is shown in Figure 1. Explain the reason gap occur between the two sets of the peaks in the figure. (b) A spectrum like that in Figure 1 is taken when the HCL gas is at much higher temperature. Predict the absorption peak with the highest intensity in this new spectrum. 8.0 8.2 8.4 8.6 8.8 9.0 9.2

The following osmotic pressures were measured for solutions of a macromolecular material in water at 25C. Concentration (gdm) Osmotic pressure (cm solution) 0.35 0.60 0.80 0.95 20 38 55 70 Assume solution density 1.05 gcm in each case. Note that solutions are not ideal. Calculate an average molecular mass of the material. (500 gmole)

A compound A reacts with hydrogen chloride to give a compound B. B reacts with magnesium to form a Grignard reagent, which is treated with propanone, and the product is hydrolysed to give 2methyl2butanol. Identify the structural formulas of A and B. Illustrate the chemical reactions involved.

What is the pH ot the oquivalonce point in the btration of a 17.4 mt sample of a 0.455 M oguoous hydrocyanic acid solution with a 0,364 M aqueous barium hydroxide solution pH

Describe chemical structure of the below molecules. a. Nucleotides b. Proteins c. Lipids d. Carbohydrates e. Natural Polymers f. Provide the structure of product(s) for the reaction of 2methyl2butene with each given reagent HBr, low temp. HPt HBr dimethyi peroxide i) O, ii) ZnH,O

(c) Identify the products of the following reactions (i) LIAIH, (ii) HH2O (i) CH3CH,MgBr (ii) HH,O (2marks) a. Name the Grignard reagent used to prepare the two compounds ) RMGB (ii) HH,0 (i) RMGBR HO Co, (ii) HH,O (2marks)

A sample of ammonia (NH3) gas is completely decomposed to nitrogen and hydrogen gases over heated iron wool. If the total pressure is 605 mmHg after the reaction, calculate the partial pressures of N and H2. Enter your answers in scientific notation. PN2 x 10 mmHg x 10 mmHg

Which conditions will produce the enolate PCC H ,PCC KMnO4 LDA, 70 C H OH, room temperature H

2. Whats wrong with the following reactions It can be anything (or multiple things). Correct each and show mechanisms. CH,Br Brg Br HO. 1. NaOH 2. bromopentane HO

Whats wrong with the following reactions It can be anything (or multiple things). Correct each and show mechanisms. CH,Br Br. Br C. . 1. NaOH HO 2. bromopentane

The energy level diagram for the first excited electronic state of He is shown below. Levels Terms p Configurations 2047 cm 1 Energy (cm) 3Po 1.00 cm 0.08 cm 3p 3P2 1s2p (b) Choose only one out of three p orbitals. Then, write completely the correct zerothorder wave functions to represent P and P states. What is the physical basis the wave

Suppose a hydrogen atom state was approximated by the function 1s 2s 3s where 1s, 2s and 3s are normalized eigenfunctions for the hydrogen atom Hamiltonian. Calculate the approximate energy associated with this function, in atomic unit.

a. What products obtain when the following compound react with HOT KMNO4 b. Predict the product when the following compound react with COLD KMno4

Show how you would carry out the following syntheses starting from Benzene 1. Aspirin 2. Paracetamol 3. 2 methyl benzamide 4. 2 Amino Benzoyl chloride

What are biodegradable polymers. Outline their synthesis and significance.

b. Describe steo growth polymer. c. Give reactions for the synthesis of following i. Bakelite ii. Melamine ii. Nylon 6

A quantity of 1.435 g of naphthalene, was burned in a constantvolume bomb calorimeter. Consequently, the temperature of the water rose from 20.28C to 25.95C If the heat capacity of the bomb plus water was, calculate the heat of combustion of naphthalene on a molar basis that is, find the molar heat of combustion. 5.151x103 kJmol 5.151x103 mol

A solution contains 5.0 g of a nonelectrolyte solute with a molar mass of 121 gmol dissolved in 95.4 g of chloroform. The solution has a freezing point of 65.8C. The freezing point of pure chloroform is 63.5C. What is the freezing point constant, kf, for this solvent Part A How many moles of solute are present in the solution,Part B How many kg of

A solution contains 5.0 g of a nonelectrolyte solute with a molar mass of 121 gmol dissolved in 95.4 g of chloroform. The solution has a freezing point of 65.8C. The freezing point of pure chloroform is 63.5C. What is the freezing point constant, kf, for this solvent Part A How many moles of solute are present in the solution,Part B How many kg of

Write the balanced molecular ionic and net ionic equations for each of the following - A) Nitric Acid + Iron (III) Hydroxide > B) Chromic Acid + Sodium Hydroxide > Water + Sodium Chromate We were instructed that H 2 O is not ionized.

When current is passed through the sodium sulfate cell, hydrogen and oxygen gas are formed. Calculate the cell potential required for the formation of 0.25 atm of oxygen and 0.50 atm of hydrogen gas. The pH is 10 on the cathode surface and pH 4 on the anode surface. When a current of 0.32 amps flows through the solution, the resistance of the

Give the mechanism of this reaction with stereochemistry of substituents in product.

Give sigmatropic reaction. The mechanism CH1 KH18Crown6 THF, ROom temp. HO

Give the mechanism of following Sigmatropic reaction.

Give Sigmatropic reaction. The mechanism of KH18Crown6 THE, Room temp. HO

What reagents would you use to carry out the following reactions CI . C2H5 CH3 C. OH d. b.

Making the electronic formula and electronic drawings of the element, whose atom contains 15 protons in the nucleus. What oxidation states can this element exhibit? Give examples (one by one) of compounds of this element in different oxidation states. Make an equation for its higher oxide and hydroxide, and determine their nature.

Which compound has the strongest sigma bond Explain the detail reason. CCH Br A

You are titrating 50.00 mL of a solution that is 0.10 M in HCl and 0.08 M in HOCI with 0.2 M NaOH. Calculate the pH after the addition of the following volumes of 0.2 M NAOH (Ka (HOCI)3.08x10). 0.00 ml, 24.00 ml, 25.00 mL, 26 mL, 45.00 mL a) How many end points will you see Why b) Draw the titration curve