 # Question & Answer: Prepare 10 mL of 0.01 M, 0.02 M, 0.05 M, and 0.06 M CuSO_4 solutions using the stock…..

Prepare 10 mL of 0.01 M, 0.02 M, 0.05 M, and 0.06 M CuSO_4 solutions using the stock solution. i. Your procedure should give specific steps and amounts

10 ml of 0.01M solution-

Molarity = moles/volume in L

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so, moles of CuSO4 = Molarity*Volume in L

= 0.01M*0.01L = 0.0001moles

Molar mass of CuSO4 = 159.6g/mol

Mass of CuSO4 = moles*molar mass

= 0.0001mol*159.6g/mol

Mass of CuSO4 = 0.016grams

So, weigh 0.016g of CuSO4 and dissolve in 10mL of water to make 0.01M solution.

2. 0.02M

Moles of CuSO4 = 0.02M*0.01L = 0.0002moles

Mass of CuSO4 = 0.0002mol*159.6g/mol = 0.0139grams

Dissolve 0.0139g of CuSO4 in 10mL water to make 0.02M solution.

3. 0.05M solution

Moles of CuSO4 = 0.05M*0.01L = 0.0005moles

Mass of CuSO4 = 0.0005moles*159.6g/mol = 0.0798grams

Dissolve 0.0798g of CuSO4 in 10mL water to make 0.05M solution.

4 . 0.06M solution

Moles of CuSO4 = 0.06M*0.01L = 0.0006moles

Mass of CuSO4 = 0.0006moles*159.6g/mol = 0.0958grams

Dissolve 0.0958 grams of CuSO4 in 10mL of water to make 0.06M solution.