question archive Question 10 What mass of silver nitrate, AgNO3, is needed to make 500
Question 10 What mass of silver nitrate, AgNO3, is needed to make 500
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Question 10
What mass of silver nitrate, AgNO3, is needed to make 500.0 mL of 0.600 mol/L AgNO3(aq)?
Question 11
You have a stock solution of 2.00 mol/L potassium iodide, KI(aq). What volume of the stock solution do you need to prepare each of the following solutions? show calculations
a) 50.0 mL of 1.00 mol/L
b) 150.0 mL of 0.500 mol/L
Question 12
A pharmaceutical assistant has a 50.0 g/L solution of glucose, C6H12O6(aq).
a) What is the concentration of the solution in mol/L?
b) What volume of the glucose solution should the pharmaceutical assistant use to make 500.0 mL of a 0.050 mol/L glucose solution? show calculations
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10) AgNO3 MW = 169.87 g/mol
0.6 mol/L x 0.5 L = 0.3 mol AgNO3
0.3 mol AgNO3 x 169.87 g/mol = 50.961 g of AgNO3
11 M1V1 = M2V2
a. (2 M) x mL = 50 mL (1 M)
x mL = 25 mL
You need 25 mL of stock solution to make 50 mL 1 M solution.
b. (2 M) x mL = 150 mL (0.5 M)
x mL = 37.5 mL
You need 37.5 mL of stock solution to make 150 mL 0.5 M solution
12 Sucrose MW = 180 g/mol
a. 50 g/L x 1 mol/180 g = 0.2778 mol/L = 0.28 M
b. M1V1 =M2V2
(0.28 M) x mL = 500 mL (0.05 M)
x mL = 89.2857 mL
The volume of 0.28 M glucose solution needed is 89.29 mL to make 500 mL of a 0.05 M glucose solution.
