CHEMISTRY

CHEM 1010

Assignment: Chapter 5

Name:

1. Balanced the following equations.

a. I2 (s) + Cl2 (aq) → ICl5(s)

b. Al (s) + O2(g) → Al2O3

c. CaSO4 (aq) + AgNO3 (aq)→ Ag2SO4 (aq) + Ca(NO3)2 (aq)

d. Fe3O4 (s) + O2 (g) → Fe2O3 (s)

e. B2H6 (l) + O2 (g) → B2O3 (s) + H2O (l )

2. Classify each of reaction as synthesis, decomposition, and single or double replacement, and combustion.

a. 2Na +Cl → 2NaCl _____________________________________

b. NaOH + HCl → NaCl + H2O ______________________________

c. 2 KClO3 → 2KCl + 3 O2 _____________________________

d. Cu + 2 AgNO3 → Cu(NO3)2 + 2Ag _____________________________

e. C3H8 + 5 O2 → 3CO2 + 4H2O ____________________________

3. Write complete net ionic equation for following reaction.

BaCl2 (aq) + K2SO4 (aq) → BaSO4 (s) + 2KCl (aq)

4. Which of the following substances are soluble or insoluble in water?

a. BaSO4 __________________

b. PbI2 _______________________

c. NaNO3 __________________________

d. NH4Cl ___________________________

e. Ca3(PO4)2__________________________

f. MgCl2__________________________

g. CaCO3 ________________________

5. A. Define following terms with example.

Oxidation, Reduction, Oxidizing agent, reducing agent

B. Assign an oxidation number of oxygen atom in each element in the following

compounds or ions.

a. N2O5

b. CO2

c. CH2O

d. HClO3

6. Identify oxidizing agent and reducing agent for following reaction.

· –

2I (aq) + Br2 (aq) _______ I2 (aq) + 2 Br (aq)

2 + 2+

Fe(s) + Cu aq) _________ Fe(aq) + Cu

7. In each of the following, tell whether the substance gains electrons or loses electrons in redox reactions.

a. An oxidizing agent

b. A reducing agent

c. A substance undergoes oxidation

d. A substance undergoes reduction

8. For the following substances, tell whether the oxidation number increases or decreases in a redox reaction.

a. An oxidizing agent

b. A reducing agent

c. A substance undergoing oxidation

d. A substance undergoing reduction

9. Write the balance equation and classify the reaction.

Silver nitrate react with potassium chloride in aqueous solution gives solid silver chloride and potassium nitrate.

10. Write and balance equation for following acid-base neutralization reactions.

a. Ca (OH )2(aq) + H2SO4(aq) →

b. Ca(OH)2 (aq) + CH3COOH(aq) →

c. NaHCO3 (aq) + HBr (aq) →

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