Chemical Reactions
Below are questions designed to prepare you for the AP Chemistry Exam "Net Ionic Equations" section. On an AP exam, you are to answer FIVE of EIGHT questions.
The AP Exam Instructions:
Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous solution unless otherwise indicated. Represent substances in solution as ions if the substance is extensively ionized. Omit formulas for any ions or molecules that are unchanged by the reaction. In all cases a reaction occurs. You need not balance.
Example: A strip of magnesium is added to a solution of silver nitrate.
Mg + Ag+ ® Mg2+ + Ag
1. magnesium metal is burned in nitrogen gas.
2. sulfur dioxide gas is passed over solid calcium oxide.
3. lead foil is immersed in silver nitrate solution.
4. a solution of ammonium sulfate is added to a saturated solution of barium hydroxide.
5. acetic acid solution is added to a solution of sodium hydrogen carbonate.
6. solid sodium dichromate is added to an acidified solution of sodium iodide.
7. a drop of potassium thiocyanate is added to a solution of iron(III) chloride.
8. ethanol is completely burned in air.
9. hydrogen gas is passed over hot iron(III) oxide.
10. solutions of potassium iodide and potassium iodate are mixed in acid solution.
11. dilute sulfuric acid is added to solid calcium fluoride.
12. solid ammonium carbonate is heated.
13. methane gas is heated with an excess of chlorine gas.
14. a concentrated solution of ammonia is added to a suspension of zinc hydroxide.
15. hydrogen peroxide is added to an acidified solution of sodium bromide.
16. dilute hydrochloric acid is added to a dilute solution of mercury(I) nitrate.
17. sodium metal is added to water.
18. dilute sulfuric acid is added to a solution of lithium hydrogen carbonate.
19. ethanol and formic acid (methanoic acid) are mixed and warmed.
20. excess concentrated potassium hydroxide solution is added to a precipitate of zinc hydroxide.
21. the gases boron trifluoride and ammonia are mixed.
22. a solution of tin(II) chloride is added to a solution of iron(III) sulfate.
23. phosphorus(V) oxytrichloride is added to water.
24. an acidified solution of potassium permanganate is added to a solution of sodium sulfite.
25. An excess of sodium hydroxide solution is added to a solution of magnesium nitrate.
26. Solid lithium hydride is added to water.
27. solutions of ammonia and hydrofluoric acid are mixed
28. Solid phosphorus (V) oxide is added to water.
29. Carbon dioxide gas is bubbled through a concentrated solution of potassium hydroxide.
Answer
30. Solid potassium permanganate is added to a concentrated solution of hydrochloric acid.
31. Ethanol is burned in oxygen.
32. An acidified solution of iron(II) chloride is mixed with a solution of potassium dichromate.