ACSBR 5 Salts - Assignment ANS

Anglo-Chinese School (Barker Road) A Methodist Institution Founded in 1886 CHEMISTRY DEPARTMENT OF SCIENCE Name: ANSWERS ( ) Class: SEC 3 SALTS – ASSIGNMENT ALEX LEE/2010 PAGE 1 OF 4 PURE/COMBINED Multiple-Choice Questions [20 Marks] TOTAL SCORE / 30 Write in your selected answer for the multiple-choice questions in the boxes provided. 1 2 3 4 5 6 7 8 9 10 B B D C C C B A B A 11 12 13 14 15 16 17 18 19 20 C B B D A A B A C B 1. Which of the following ionic compounds is the most soluble in water? A calcium carbonate C silver chloride B magnesium sulfate D zinc hydroxide 2. Which of the following ionic compounds is the least soluble in water? A ammonium carbonate C iron(III) chloride B barium sulfate D lead(II) nitrate 3. Which of the following pairs of salts can be separated by adding water and filtering? A barium chloride, lead(II) nitrate C iron(III) sulfate, zinc nitrate B calcium sulfate, silver chloride D magnesium carbonate, lithium iodide 4. Which two pairs of solutions, when mixed, will produce a precipitate? A barium chloride, potassium nitrate C hydrochloric acid, silver nitrate B copper(II) iodide, sodium nitrate D lead(II) nitrate, zinc nitrate 5. Which two pairs of solutions, when mixed, will not produce a precipitate? A ammonium chloride, silver nitrate C lead(II) nitrate, magnesium nitrate B calcium chloride, sulfuric acid D sodium hydroxide, zinc nitrate 6. Which of the following is not an alkali? A ammonium hydroxide C magnesium hydroxide B calcium hydroxide D sodium hydroxide

ALEX LEE/2010 PAGE 2 OF 4 7. An unknown compound X is insoluble in water and reacts with acids to produce a gas. Which of the following is most likely to be X? A aluminium hydroxide C lithium carbonate B copper(II) carbonate D magnesium metal 8. Aqueous solutions of two salts were mixed. A white precipitate was formed, which was filtered off and transferred to another container. A few drops of dilute hydrochloric acid were added to the solid, and effervescence was observed. What could the two salts be? A ammonium carbonate, barium nitrate C barium chloride, magnesium sulfate B copper(II) chloride, silver nitrate D iron(III) sulfate, sodium hydroxide 9. Which of the following salts should be prepared by titration? A calcium sulfate C magnesium nitrate B lithium chloride D silver nitrate 10. Which of the following salts should be prepared by precipitation? A calcium sulfate C magnesium nitrate B lithium chloride D silver nitrate 11. Jeremy wishes to prepare a sample of potassium chloride. Which of the following solutions would not be suitable as a starting reagent? A potassium carbonate C potassium nitrate B potassium hydroxide D hydrochloric acid 12. Which pair of substances can be used in the preparation of zinc sulfate? A aqueous zinc nitra