Molarity and Dilution

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?

• 27.8 mL

• 27.78 mL

• 2.8 mL

• 278 mL

What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

• 150. mL

• 151 mL

• 1.00 L

• 100. mL

If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?

• 2 M

• 0.02 M

• 0.033 M

• 0.08 M

A student wants to make 275 mL of 3.00 M LiOH by diluting a 8.00 M LiOH solution. How much of that solution should be used?

• 0.09 mL

• 733.3 mL

• 103.125 mL

• 53.5 mL

A student wants to make 100. mL of 0.25 M C₆H₁₂O₆ by diluting a 1.3 M C₆H₁₂O₆ solution. How much of that solution should be used? Which answer shows the correct way to solve this problem?

• (100. X 0.25) / 1.3

• (100. X 1.3) / 0.25

• 100. / (1.3 X 0.25)

• (1.3 X 0.25) / 100.

How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?

• 7.5 mL

• 15 mL

• 1333 mL

• 200 mL

A teacher starts with 2.5 L of a 2.25 M HNO₃ solution and dilutes it to 4.0 L. What is the concentration of HNO₃ in the new solution?

• 4.4 M

• 3.6 M

• 0.7 M

• 1.4 M

Which of these is the CORRECT equation for solving for Molarity?

• M = mol / mL

• M = mol / L

• M= mL / mol

• M = L / mol

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M