Molarity and Dilution Problems

Calculate the moles of solute needed to make 0.750L of 2.50 M NaCl solution? (remember M=mol/L)

• 3.33 moles

• 2.50 moles

• 1.88 moles

• 109 moles

What MASS (in grams) of AgNO₃ must be used to make 0.200 L of a 0.100 M solution? (remember M=moles/L, but I did not ask for moles, so you will need to convert the moles into grams!!) molar mass of silver nitrate is 169.87g/mol

• 3.40g

• 84.9g

• 0.000118g

• 0.02g

DILUTION: How much stock solution (concentrated at 18.00 M) of H₂SO₄ must be mixed to create a 6.00 M 1.75 L solution? (remember M₁V₁=M₂V₂)

• 0.500 L

• 1.71 L

• 61.7 L

• 0.583 L

Calculate the molarity of a solution made with 30.0g of HCl with 500.0 mL (remember, M=moles/L but I did not give you moles...) molar mass of HCl is 36.46g/mol AND 1000mL=1L

• 1.65 M

• 60.0 M

• 0.412 M

• 0.00165 M

How many L of a 1.00 M KNO₃ solution is needed to make a 0.750 L of 0.230 M solution? (remember M₁V₁=M₂V₂)

• 173 L

• 0.173 L

• 3.26 L

• 0.307 L