Chapter 18 Problems Set I

UNIT 15 PROBLEMS SET I NAME______

1. Would the following mixture be acidic, basic or neutral? (review Acid/base) 12.0 grams of solid NaOH added to 200.0 ml of 2 M HCl. Show all work for credit.

2. A student obtained the following results after titration of a 50.0g sample of Tums which contains some KOH, a base, with a 4.0 M monoprotic acid. The initial volume of the acid was 14.0 ml and the final burette reading was 34.0 ml. What is the mass % base in the Tums? (review titration, % mass)

3. What is the molarity of a base if 20.0 ml of it was titrated to the endpoint by14.0 ml of 2.5 M monoprotic acid? (review molarity)

4. Give the Lewis definition of an acid and base below: (review lewis definition)

5. Balance the following equation: (obj. 5)

-1 -2 -1 -2 MnO4 + H2O + SO3 <===> MnO2 + OH + SO4

+2 - 6. Which chemical species will oxidize Cu to Cu but will not oxidize Br to Br2? +2 +1 Your choices are: F2, Fe or Ag (obj. 6,9,11)

7. Identify each of the following as oxidation (O) or reduction (R). Place the letter in front of the equation. (obj. 1) _____ A. Na -----> Na+1 + e-1

_____ B. F + e-1 -----> F-1

_____ C. Mg+2 + 2e-1 -----> Mg

-1 -1 _____ D. 2 Cl -----> Cl2 + 2e

-2 -1 _____ E. O2 -----> O2 + 2e 8. In each of the following oxidation-reduction equations identify the oxidizing agent (OA) and the reducing agent (RA). (obj. 6)

A. C + O2 ------> CO2 ______

B. 2Na + Cl2 ------> 2NaCl ______

C. 2H2 + O2 ------> 2H2O ______

9. ASSIGN OXIDATION NUMBERS TO EACH OF THE FOLLOWING SPECIES AND PLACE THE NUMBER IN THE SPACE PROVIDED. (obj. 3)

Fe + Cl2 ----> FeCl3

Fe _____ Cl _____ -----> Fe _____ Cl _____

-1 +1 +2 +2 Co + MnO4 + H -----> Co + Mn + H2O

Co _____ Mn _____ O _____ H _____ ----> Co _____ Mn _____ H _____ O _____

Fe3O4 + Al -----> Fe + Al2O3

Fe _____ O _____ Al _____ ----> Fe _____ Al _____ O _____

-1 -1 +1 I2 + Cl2 + H2O -----> IO3 + Cl + H

I _____ Cl _____ H _____ O _____ ----> I _____ O _____ Cl _____ H _____