Chem 400
BALANCING CHEMICAL EQUATIONS,
Nuss
INSTRUCTIONS:
 For each word equation, write a balanced chemical formula equation. Include
physical state symbols.
 State the type or class of reaction for each.
 Identify the driving force of the reaction (i.e., gas formation; ppt formation;
weak electrolyte formation; non-electrolyte formation; redox (battle for
electrons)
 Write the answers on a separate sheet and number each.
1. Solutions of potassium hydroxide and aluminum nitrate were mixed together
yielding a white ppt and a soluble salt.
2. Drinking alcohol, ethanol (CH3CH2OH), burns completely in oxygen gas to
give two products only: water vapor and carbon dioxide gas.
3. Aqueous chlorine reacts with a solution of sodium iodide to give sodium
chloride and elemental iodine in solution.
4. Solutions of phosphoric acid and calcium hydroxide neutralize each other. A
white ppt is observed.
5. HgO solid (mercuric oxide) when heated breaks down into its elements.
6. Sodium metal reacts with oxygen gas to give sodium oxide.
7. Potassium carbonate crystals react with hydrochloric acid to give water and a
gas that would smother a flame and potassium chloride solution.
8. Decane (C10H22) burns completely in air.
9. Aluminum metal reacts with fluorine gas to form aluminum fluoride.
10. Sulfuric acid plus Fe(OH)3 solid react together. No ppt is observed.
11. Solutions of calcium acetate and lithium sulfide react to give one ppt.
12. Silver nitrate solution reacts with copper wire to give a blue solution and a
beautiful deposit of silver.
13. Magnesium metal burns in nitrogen gas to give magnesium nitride.