Directions: Answer each of the following questions.

MOLARITY  

 

1. What is the molarity of a solution in which 58 g of NaCl are dissolved in 1.0 L of solution?

 

2. What is the molarity of a solution in which 10 g of AgNO3 is dissolved in 500. mL of solution?

 

3. How many grams of KNO3 should be used to prepare 2.00 L of a 0.500 M solution?

 

4. To what volume should 5.0 g of KCl be diluted in order to prepare a 0.25 M solution?

 

5. How many grams of CuSO4 * 5 H2O are needed to prepare 100 mL of a 0.10 M solution?

 

 

 

 

 

 

Directions: Follow the instructions in Part A and Part B to complete the assignment.

Part A: Moles

Directions: Answer each of the following questions.

1. Define “mole”.

2. How many grams are there in 3.4 x 1024 molecules of NH3?

3. What is the molar mass of MgO?

4. How are the terms “molar mass” and “atomic mass” different from one another?

5. Which is a better unit for expressing molar mass, “amu” or “grams/mole”?

Part B: Grams/Moles Calculations

Directions: Given the following, find the number of moles:

6. 30 grams of H3PO4

7. 25 grams of HF

8. 110 grams of NaHCO3

9. 1.1 grams of FeCl3

10. 987 grams of Ra(OH)2

An electrochemical cell consist of a Cu and Zn electrode in an electrolyte, using the following half reactions to answer the following questions