Choose the one correct or one incorrect statement regarding chromatography: gravity can be used as a...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Choose the one correct or one incorrect statement regarding chromatography: gravity can be used as a delivery system the mobile phase can be a gas the chromatographic bed can be a resin the chromatographic bed can be a glass sheet the stationary phase can be a liquid Choose the one correct or one incorrect statement regarding the technique of ion exchange chromatography: the resin is a soluble salt with a net charge which can bind ions of opposite charge ions in the sample mixture are separated based on their charges this technique uses the reversible interchange of ions between the mobile and stationary phases an ion with a lower binding affinity will be displaced from the resin binding sites by an ion with higher binding affinity neutral ions will not interact with the resin binding sites and will elute from the column quickly An ion exchange chromatography experiment was conducted to determine the concentration of Cu²+ in an unknown solution. The eluate solution was collected and titrated with 0.1034 M NaOH titrant using phenolphthalein as an indicator. The results of the experiment are summarized in the table below: Trial 1 2 3 Test sample volume (mL) 5.00 5.00 5.00 0.133 M What is the average Cu²+ concentration in the unknown solution? 0.267 M 0.533 M 0.00758 M DI water rinse (mL) 75 mL 75 mL 75 mL 0.0666 M Initial burette reading Final burette reading (mL) (mL) 0.03 12.92 12.92 25.81 25.81 38.70 Ţ 7 + Refer to this table of relative binding affinity to identify the following statement as true or false: Lit H Na Mg2 Cu Ca²+ Ag 0.79 1.00 1.56 2.59 3.03 4.06 6.70 Cation Relative binding affinity on resin X Resin X is a cation exchange resin. True False DE ysic Refer to this table of relative binding affinity to identify the following statement as true or false: H+ Na Mg2+ Cu2+ Ca²+ Ag Lit 0.79 1.00 1.56 2.59 3.03 4.06 6.70 Cation Relative binding affinity on resin X Resin X could be saturated with hydrogen ions to test for lithium ions. True False A waste solution containing copper ions was analyzed using ion exchange chromatography and titration, and it was determined that the solution has a copper ion concentration of 0.1242 M. The waste solution needs to be treated with sodium sulphide, Na₂S, to precipitate the copper from solution as copper sulphide, CuS, according to the following reaction: Cu2+ + Na₂S-> CuS + 2Na+ What mass of Na₂S must be added, per litre of waste solution, to react fully with the copper present? Molar mass of Cu²+: 63.546 g/mol Molar mass of Na₂S: 78.045 g/mol 0.1954 g 15.25 g 7.892 g 9.693 g 0.07892 g Choose the one correct or one incorrect statement regarding chromatography: gravity can be used as a delivery system the mobile phase can be a gas the chromatographic bed can be a resin the chromatographic bed can be a glass sheet the stationary phase can be a liquid Choose the one correct or one incorrect statement regarding the technique of ion exchange chromatography: the resin is a soluble salt with a net charge which can bind ions of opposite charge ions in the sample mixture are separated based on their charges this technique uses the reversible interchange of ions between the mobile and stationary phases an ion with a lower binding affinity will be displaced from the resin binding sites by an ion with higher binding affinity neutral ions will not interact with the resin binding sites and will elute from the column quickly An ion exchange chromatography experiment was conducted to determine the concentration of Cu²+ in an unknown solution. The eluate solution was collected and titrated with 0.1034 M NaOH titrant using phenolphthalein as an indicator. The results of the experiment are summarized in the table below: Trial 1 2 3 Test sample volume (mL) 5.00 5.00 5.00 0.133 M What is the average Cu²+ concentration in the unknown solution? 0.267 M 0.533 M 0.00758 M DI water rinse (mL) 75 mL 75 mL 75 mL 0.0666 M Initial burette reading Final burette reading (mL) (mL) 0.03 12.92 12.92 25.81 25.81 38.70 Ţ 7 + Refer to this table of relative binding affinity to identify the following statement as true or false: Lit H Na Mg2 Cu Ca²+ Ag 0.79 1.00 1.56 2.59 3.03 4.06 6.70 Cation Relative binding affinity on resin X Resin X is a cation exchange resin. True False DE ysic Refer to this table of relative binding affinity to identify the following statement as true or false: H+ Na Mg2+ Cu2+ Ca²+ Ag Lit 0.79 1.00 1.56 2.59 3.03 4.06 6.70 Cation Relative binding affinity on resin X Resin X could be saturated with hydrogen ions to test for lithium ions. True False A waste solution containing copper ions was analyzed using ion exchange chromatography and titration, and it was determined that the solution has a copper ion concentration of 0.1242 M. The waste solution needs to be treated with sodium sulphide, Na₂S, to precipitate the copper from solution as copper sulphide, CuS, according to the following reaction: Cu2+ + Na₂S-> CuS + 2Na+ What mass of Na₂S must be added, per litre of waste solution, to react fully with the copper present? Molar mass of Cu²+: 63.546 g/mol Molar mass of Na₂S: 78.045 g/mol 0.1954 g 15.25 g 7.892 g 9.693 g 0.07892 g
Expert Answer:
Answer rating: 100% (QA)
The detailed answer for the above question is provided below Question 1 Chromatography is a versatile separation technique used in various fields to separate and analyze complex mixtures of substances ... View the full answer
Related Book For
Materials and process in manufacturing
ISBN: 978-0471656531
9th edition
Authors: E. Paul DeGarmo, J T. Black, Ronald A. Kohser
Posted Date:
Students also viewed these chemistry questions
-
A circular loop of wire can be used as a radio antenna. If a 18.0-cm-diameter antenna is located 2.50 km from a 95.0-MHz source with a total power of 55.0 kW, what is the maximum emf induced in the...
-
The tert-butyl group can be used as a blocking group in certain syntheses of aromatic compounds. (a) How would you introduce a tert-butyl group? (b) How would you remove it? (c) What advantage might...
-
A study was conducted to determine whether certain features could be used to explain variability in the prices of furnaces. For a sample of 19 furnaces, the following regression was estimated: y =...
-
A square duct, 30 cm by 30 cm, is maintained at a constant temperature of 30oC and an airstream of 50oC and 1 atm is forced across it with a velocity of 6 m/s. Calculate the heat gained by the duct....
-
Use the following information about sales and costs to prepare a scatter diagram. Draw a cost line that reflects the behavior displayed by this cost. Determine whether the cost is variable,...
-
Suppose for some year the income of a small company is $110,000; the expenses are $65,000; the depreciation is $25,000; and the effective income tax rate = 40%. For this year, the ATCF is most nearly...
-
Implementation plays a critical part in environmental management.Why might environmental management fail at the implementation stage? Can these reasons for failure be corrected or avoided?
-
Mr. Davis was the owner and CEO of Davis Motors, a car company, which manufactured luxury car. Ms. Clara Brown worked there as a technical supervisor. During routine inspections, she found that the...
-
Ledger Properties has the following financial information: Current Year Prior Year Revenues $ 48,915 $ 43,610 Administrative expenses 12,106 11,602 Interest expense 816 468 Cost of goods sold 29,715...
-
Exercise 2: Implement calculate_S and calculate_R Recall that the element-wise squared Euclidean distance matrix D O DE Rnxm is defined by [D D] = (x; zj) (x; Zj) - - Also, the matrices S, RE Rnxm...
-
Identify specific artifacts you might look for at Sun City to evaluate their diversity, using at least three specific examples or topics covered in the reading. For example, since Sun City is in a...
-
Hart, Attorney at Law, experienced the following transactions in Year 1, the first year of operations: 1. Accepted $19,300 on April 1, Year 1, as a retainer for services to be performed evenly over...
-
Emergency Transport serves four hospitals within the city. The hospitals' locations are given below. North I) II) South West A(20W,50N) D(10W,40S) 0 B(15E,30N) C(25E,10S) East Assuming that the...
-
Listed below are a few events and transactions of Kodax Company. Year 1 January 2 Purchased 7 5 , 0 0 0 shares of Grecco Company common stock for $ 5 3 1 , 0 0 0 cash. Grecco has 3 0 0 , 0 0 0 shares...
-
Refer to the information for Aulman Inc. above. Also, although the Furniture Division has been operating at capacity (50,000 dressers per year), it expects to produce and sell only 40,000 dress- ers...
-
A runner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 35 m. If he completes the 200 m dash in 28.8 s and runs at constant...
-
5. 2. In which mobile plant would you find hydraulic suspension and hydraulic circuitry? Explain why this machine may use this type of suspension. 3. List PPE needed to work on suspension systems in...
-
Explain the differences and similarities between fringe benefits and salary as forms of compensation.
-
What type of postprocessing is required for SIB processes?
-
For orthogonal machining, the cutting edge radius is assumed to be small compared to the uncut chip thickness. Why?
-
When a helical gear is machined on a milling machine, the table lead screw and the universal dividing head have to be connected by a gear train. Why?
-
Write down the structure of a three-dimensional VARMA model if the vector time series has the following three components: \(\operatorname{SCM}(0,0), \operatorname{SCM}(0,1)\), and...
-
Consider the three SCMs of Question 3. If the maximum elements, in absolute value, of the three rows of the transformation matrix \(T\) are \((1,1),(2,3)\), and \((3,2)\), respectively. Write down...
-
Consider the realized volatilities of the Alcoa stock from January 2, 2003, to May 7, 2004, for 340 observations. The realized volatilities are the sum of squares of intraday \(m\)-minute log...
Study smarter with the SolutionInn App