Moles and Molarity

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 have 340.0 mL of a 0.500 M NaBr solution, what will the concentration be if I add 560.0 mL more water to it? (Remember to use the total new volume)

• .188 M

• 3.78 M

• .389 M

• 1.76 M

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

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

When you make a dilution, which of these values remains constant?

• The molarity (M)

• The total moles of solute

• The volume (V)

• The concentration

Tags

NGSS.HS-PS1-7

As we dilute a solution.....

• The volume increases and the molarity (M) increases

• The volume increases and the molarity (M) decreases

• The volume decreases and the molarity (M) increases

• The volume decreases and the molarity (M) decreases

Tags

NGSS.HS-PS1-5

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

How many mL of 1.0M KBr solution would you need to prepare 250 mL of a 0.2M dilution?

• 175 mL

• 250 mL

• 50 mL

• 5 mL

What would the molarity of a solution be if you took 10 mL of a 13M stock solution and made a 300 mL solution?

• 390M

• 230M

• 0.43M

• 0.26M

Which of the following is the Dilution Formula?

• V₁M₁ = V₂M₂

• M = m/V

• V = mT

• PV = nRT