Making a Solution

1. Which is the proper sequence for making 1 liter of solution using a 1.000 L volumetric flask?

 A. Place flask on balance, tare balance, add required mass of solid, add some water, dissolve solid, dilute to mark. 

 B. Place flask on balance, tare balance, add required mass of solid, add some water, dissolve solid, dilute to mark, insert stopper and invert several times to mix the soution. 

 C. Tare balance, place flask on balance, add required mass of solid, add some water, dissolve solid, dilute to mark, insert stopper and invert several times to mix solution. 

 D. Place flask on balance, tare balance, add required mass of solid, add some water, dilute to mark, insert stopper and invert several times to dissolve solid. 

 E. Place flask on balance, tare balance, add required mass of solid, add some water, dissolve solid, add 1.000L of water, insert stopper and invert several times to dissolve solid and mix solution. 

2. How many grams of Na2SO4 should be weighed out to make 500.0 mL of 0.500 M solution?

 A. 16.8 g  B. 142 g  C. 29.8 g  D. 35.5 g 

3. A solution is prepared by placing 50.0 g of KBr into a 100.0 mL volumetric flask that is then filled and mixed correctly. What is the molarity of the solution?

 A. 3.67 M  B. 4.20 M 

 C. 42 M  D. 7.8 M 

4. A chemist wishes to dissolve 14.867 g of AgNO3 to produce a 0.350 M solution. What size volumetric flask should she select?

 A. 100 mL  B. 250 mL  C. 1 L  D. 500 mL