Review Molarity, Molality, & Dilutions

A solution of Ga(ClO4)3 is diluted from its original concentration of 2.0 M to a new concentration of 1.9 M. If its new volume is 0.53 L, what was the original volume of the concentrated solution?

• A. 0.357 L

• B. 0.408 L

• C. 0.443 L

• D. 0.504 L

Tags

NGSS.HS-PS1-7

How many moles of V(ClO4)3 are in 0.919 L of 2.70 M solution?

• A. 1.66 mol

• B. 1.94 mol

• C. 2.31 mol

• D. 2.48 mol

0.4 mol of Na3PO4 are dissolved in 1.04 L of water. What is the concentration of this solution in molarity?

• 0.254 M

• 0.308 M

• 0.342 M

• 0.385 M

How many grams of solute are present in 25.0 mL of a 3.50 M NaOH solution?

What is the molality of a solution which contains 30.0 g of CaCl₂ dissolved in 150 g of H₂O

• 2.6 m

• 1.8 m

• 0.2 m

• 0.05 m

The solvent is given in grams. How do you get Kg?

• Divide by 1,000

• Multiply by 1,000

• Nothing

• Divide by molar mass

The solute is given in grams. How do you get moles?

• Divide by 1,000

• Multiply by 1,000

• Nothing

• Divide by molar mass