please answer all these question.

please help with these questions

11 mark 1. (a) Identify the spectator ions in the following equation Cl(aq) . 2 Naa) . 21- (aq) - (aq) + 2Na+ (aq) + 2CH(4) (D) Rewrite the equation to give the net ionic reaction 11. ma Use the solubility guidelines below to help you answer question 2 and 3 Cation Anion CI. Br. SO CO OH NO Na, K S S S s s Mga s S X X 5 Cat S X X Sparingly s Bal S X X Sparingly S A S S X S Zn! S S X S Pb X X X S Ag X Sparingly X S S Soluble X-insoluble.. no salt 2 An unlabelled bottle contained a solution of one of the following PNO. AlCl and Na.SO. In order to establish the identity of this solution known samples of Pb(NO.. AlCb and Na SO. were reacted separately with BAINO and then with NAOH ta) Copy the table below and complete it to indicate whether or not a precipitate was obtained in these reactions. Write the formula of any precipitates produced 16 marks Ba(NOs result NaOH result Compound Pb(NO) AICI! Na SO. (a) 2 (b) Write a balanced equation and a net ionic equation for the reactions that occur. Include stalo symbols. Identify the spectator ion(s) in the solutions [12 marks! 3 Zinc carbonate and zinc hydroxide are white solids that react with acidic solutions (a) Write a balanced equation and an ionic equation for the reaction that occurs when each substance reacts with a hydrochloric acid solution include state symbols. 23 marks! (b) By observing the two reactions in part(a) could you distinguish the two zinc compounds from each other? If so, how? [2 marks 4. Nitrous acid engages in a proton-transfer reaction with the ethancato ion, CH.COM HNO.(09) CH.CO (aci NO4 (aq) + CHICOH (aa) (a) For the forward reaction identify the acid and base. 12 marks (b) Identify the acid and base for the reverse reaction 12 marks lej Identify the conjugate of HNO is it the conjugate acid or the conjugate base? [1 mark (d) Identify the other conjugate acid-base pair and classily each species as the acid or the base 12 marks 5. Calculate f) the number of grams of solute in 250 cm+of 0.175 mol dm--MgBry Na SO. () 2 (b) Write (9 a balanced equation and (x) a net ionic equation for the reactions that occur. Include state symbols. Identify the spectator ions in the solutions [12 marks] 3. Zinc carbonate and zinc hydroxide are white solids that react with acidic solutions (a) Write a balanced equation and an ionic equation for the reaction that occurs when each substance reacts with a hydrochloric acid solution. Include state symbols 12 x 3 marks (b) By observing the two reactions in part(a) could you distinguish the two zinc compounds from each other? If so, how? 12. marks! 4 Nitrous acid engages in a proton-transfer reaction with the chancate ion, CH.CO, HNO (9) CH.CO () NO (aq) +CH.COH (1) (a) For the forward reaction identify the acid and base 12 marks] (b) Identify the acid and base for the reverse reaction [2 marks (c) Identify the conjugate of HNO. Is it the conjugate acid of the conjugate base? 11 mark (d) Identify the other conjugate acid-base pair and classify each species as the acid or the base 12 marks] 5. Calculate (a) the number of grams of solute in 250 cm of 0.175 mol dmMgBez: (b) the molar concentration of a solution containing 14.75g of Cu(NO 2 in 1.375 dm (c) the volume of 1.50 moldim-NaSO.. in cm, that contains 2.50 g of solute Express your answer to the correct number of significant figures 13 2 marks 6 A solution of CaCty has a concentration of 0.100 mol dm- (a) What is the concentration of the CaCl solution in mg dm-?? (b) What are the concentrations in mg dm of the Car and Cons? [2 marks [3 marks! 7 (a) in order to standardise a solution of sodium hydroxide, a chemist first prepared a solution of ethanedioic acis-2-water, HOOC-COOH-2H0. by dissolving 216 g of ethanedioic acid-2- water in water and making the solution up to 500 cm in a graduated flask. He then pipetted 25.0 cm of this solution to a conical flask added phenolphthalein solution as indicator and bitrated it against the sodium Hydroxide solution: 24.1 cm of the latter were required 6) Draw a display structure for ethanedioic acid 11 markt a) Hence write a balanced equation for the reaction between the acid (HOOC-COOH) and sodium hydroxide (NaOH). 12 mart 3 (a) Calculate the number of moles of the acid, HOOC-COOH-2H0 in 250 cm 2 marks in Calculate the concentration of the sodium Hydroxide solution [2 marks (b) The chemist then used the standardised sodium hydroxide to estimate the concentration of sulphuric acid from a car battery. He found that 4.00 cm of battery acid were neutralised by 23.7 cm of the sodium hydroxide solution Calculate the concentration of sulphuric acid in the battery acid, first in mol per dim and then in grams per dm Is marks 5. Calculate (a) the number of grams of solute in 250 cm of 0.175 moldim.MgBx (b) the molar concentration of a solution containing 1475 g of Cu(NO in 1375 m (c) the volume of 150 moldma.Soc.incm that contains 250 g of solute Express your answer to the correct number of significant figures 32 marks & A solution of CaCl has a concentration of 0.100 malam (a) What is the concentration of the Cach solution in mg om? (b) What are the concentrations in mg dm the cand -ione? 2 marks 13 mars! 7 (a) in order to standardise a solution of sodium hyr a chemust first prepared a solution of thanedioic acid-2-water. HOOC-COOH-HO. Dy dissolving 218 g of ethanedioic acid-2 water in water and making the solution up to 500 om in a graduated fast. He then pipetted 28.0 cm of this solution into a conical flask added phenolphthalein solution as indicator and strated against the sodium hydroxide solution: 241 cm of the latter were required. ) Draw a display structure for ethanedioic acid 11 mark Hence write a balanced equation for the reaction between the acid (HOOC-COOH) and sodium hydroxide (NaOH). 12 mark (i) Calculate the number of moles of the acid, HOOC-COOH-2H0 in 250 cm 2 marks (1) Calculate the concentration of the sodium hydroxide solution [2 marks (b) The chemist then used the standardised sodium hydroxide to estimate the concentration of sulphuric acid from a car battery. He found that 400 G) of battery acid were neutralised by 23.7 cm of the sodium hydroxide solution Calculate the concentration of sulphuric acid in the battery acid, first in mol per dim and then in grams per om 15 marks! (c) Why does the student have to calculate the concentration at the sodium Hydroxide using this stration method rather than just weighing out a given amount and dissolving it in a known volume of water? [2 marks] Total Marks = 60 [1 mark] 1. (a) Identify the spectator ions in the following equation Cl2 (aq) + 2 Nat(aq) + 21- (aq) 12 (aq) + 2 Na+ (aq) + 2 C1- (aq) (b) Rewrite the equation to give the net ionic reaction. [1 mark] S Use the solubility guidelines below to help you answer question 2 and 3 Cation Anion CI-. Br, 1- SO42- CO32- OH- NO3- Na, K+ S S S S S Mg2 S S X S Ca2+ S Sparingly S Ba2 S Sparingly S A13 S S S Zn2 S X S S Ag* X Sparingly S S $ X x x 0 0 0 0 0 0 0 s Pb2 XX X S = Soluble, X = insoluble, - = no salt = S = Soluble, X = insoluble, - = no salt 2. An unlabelled bottle contained a solution of one of the following: Pb(NO3)2, AlCl3 and Na2SO4. In order to establish the identity of this solution known samples of Pb(NO3). AlCl3 and Na2SO4 were reacted separately with Ba(NO3)2 and then with NaOH. (a) Copy the table below and complete it to indicate whether or not a precipitate was obtained in these reactions. Write the formula of any precipitates produced. [6 marks) Ba(NO3)2 result NaOH result Compound Pb(NO3)2 (aq) AlCl3 (aq) Na SO4 (aq) 2 (b) Write (i) a balanced equation and (ii) a net ionic equation for the reactions that occur. Include state symbols. Identify the spectator ion(s) in the solutions. [12 marks] 3. Zinc carbonate and zinc hydroxide are white solids that react with acidic solutions. (a) Write a balanced equation and an ionic equation for the reaction that occurs when each substance reacts with a hydrochloric acid solution. Include state symbols. [2 x 3 marks] (6) By observing the two reactions in part (a) could you distinguish the two zinc compounds from each other? If so, how? [2 marks] 4. Nitrous acid engages in a proton-transfer reaction with the ethanoate ion, CH3CO2 : HNO2(aq) + CH3CO2 (aq) NO2 (aq) + CH3CO2H (aq) (a) For the forward reaction identify the acid and base. [2 marks] (b) Identify the acid and base for the reverse reaction. [2 marks] (c) Identify the conjugate of HNO2. Is it the conjugate acid or the conjugate base? [1 mark] (d) Identify the other conjugate acid-base pair and classify each species as the acid or the base. [2 marks] 5. Calculate (a) the number of grams of solute in 250 cm3 of 0.175 mol dm-3 MgBrz: (b) the molar concentration of a solution containing 14.75 g of Cu(NO3)2 in 1.375 dm3; (c) the volume of 1.50 mol dm-Na2SO4, in cm3, that contains 2.50 g of solute. Express your answer to the correct number of significant figures. [3 x 2 marks] 6. A solution of CaCl2 has a concentration of 0.100 mol dm-3. (a) What is the concentration of the CaCl solution in mg dm-3? (b) What are the concentrations in mg dm3 of the Ca2+ and Chions? [2 marks] [3 marks) 7 (a) In order to standardise a solution of sodium hydroxide, a chemist first prepared a solution of ethanedioic acid-2-water, HOOC-COOH.2H20, by dissolving 21.6 g of ethanedioic acid-2- water in water and making the solution up to 500 cm3 in a graduated flask. He then pipetted 25.0 cm3 of this solution into a conical flask, added phenolphthalein solution as indicator, and titrated it against the sodium hydroxide solution: 24.1 cm of the latter were required. ( Draw a display structure for ethanedioic acid [1 mark] (ii) Hence write a balanced equation for the reaction between the acid (HOOC-COOH) and sodium hydroxide (NaOH). [2 mark] 3 (ii) Calculate the number of moles of the acid, HOOC-COOH.2H20 in 25.0 cm3 [2 marks] (iv) Calculate the concentration of the sodium hydroxide solution. [2 marks) (b) The chemist then used the standardised sodium hydroxide to estimate the concentration of sulphuric acid from a car battery. He found that 4.00 cm3 of battery acid were neutralised by 23.7 cm3 of the sodium hydroxide solution. Calculate the concentration of sulphuric acid in the battery acid, first in mol per dm3 and then in grams per dm3. [5 marks) (c) Why does the student have to calculate the concentration of the sodium hydroxide using this titration method rather than just weighing out a given amount and dissolving it in a known volume of water? [2 marks]