CHM 1025C Module Five Sample Name:__ __________

Part H1 Double Replacement Reaction:

Neutralization/Gas Forming Reactions 10 points

Compounds containing the following ions are generally soluble in water:

1. Alkali metal ions and ammonium ions, Li⁺ , Na⁺ , K⁺ , NH₄⁺

2. Acetate ion, C₂H₃O₂^-

3. Nitrate ion, NO₃^-

4. Halide ions (X), Cl^- , Br^- , I^- (AgX, Hg₂X₂ , and PbX₂ are insoluble exceptions)

5. Sulfate ion, SO₄ ^2- (SrSO₄, BaSO₄ , and PbSO₄ are insoluble exceptions)

Compounds containing the following ions are generally insoluble in water:

6. Carbonate ion,CO₃^2- (see rule 1 exceptions which are soluble)

7. Chromate ion CrO₄^2- (see rule 1 exceptions which are soluble)

8. Phosphate ion PO₄^3- (see rule 1 exceptions which are soluble)

9. Sulfide ion, S^2- (CaS, SrS, BaS, and rule 1 exceptions are soluble in water)

10. Hydroxide ion, OH^- [ Ca(OH)₂ , Sr(OH)₂ , Ba(OH)₂ , and rule 1 exceptions are soluble)

Given the following Solubility Rules for Ionic Compounds:

Complete and balance the following precipitation reactions using the above solubility table

(write no reaction if both products are soluble or a covalent compounds is not formed)

1. Mg(OH)₂ (s) + H₂SO₄ (aq) ------>

2. H₃PO₄ (aq) + KOH (aq) ------>

3. NH₄NO₃ (aq) + Ba(OH)₂ (aq) ---->

4. HBr (aq) + Pb(CO₃)₂ (aq) ----->

5. LiOH (aq) + H₃PO₄ (aq) --->

Note:
Neutralization ion Exchange Reaction:

1. When an acid reacts with a base, salt plus water are the products

Gas Forming Ion Exchange Reactions:

2. When either H₂CO₃ or NH₄OH is formed as a product it immediately

decomposes thus demonstrating a gas forming reaction. Most books

do not show the either H₂CO₃ or NH₄OH as products, just the

decomposed products of the gases and water in the answer.