Molarity and Dilutions Practice

How many moles are needed to make 2.5 L of a 3.8 M solution? 

• 9.5 mol
• 0.66 mol
• 1.5 mol
• 15 mol

What is the concentration of a solution that has a volume of 2.5 L and contains exactly 660.0 grams of Ca₃(PO₄)₂?

• 264 M

• 0.85 M

• 3.7 M

• 2.0 M

How many liters of 0.88 M solution can be made with 25.5 grams of LiF?

• 0.87 L

• 29 L

• 1.1 L

• 0.46 L

How many grams of copper(II) fluoride (CuF₂₎ are needed to make 6.7 liters of 1.2 M solution?

• 8.0 g

• 5.6 g

• 660 g

• 810 g

You have a 0.5 M MgSO₄ stock solution available.  Calculate the volume of the stock solution needed to make 2.0 L of 0.20 MgSO₄.

• 0.8 L
• 5 L 
• 0.1 L
• 0.5 L

If I add water to 100.0 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?

• 0.23 M
• 0.10 M
• 1.0 x 10⁵ M
• 1.0 M

Calculate the molarity of the following solution:  1.0 moles of KCl in 750.0 mL of solution.

• 0.750 M
• 99 M
• 1.3 M
• 2.0 M

Calculate the molarity of the following solution:  400.0 g of CuSO₄ in 4.00 L solution.

• 100. M
• 251 M
• 0.627 M
• 1.60 M

Calculate the number of moles and the number of grams of the following solution:  1.0 L of 0.50 M NaCl.

• 2.0 mol and 120 g
• 0.50 mol and 25 g 
• 2.0 mol and 99 g
• 0.50 mol and 29 g

Tags

NGSS.HS-PS1-7

What is the volume (in liters) of a 0.20 M solution that contains 0.30 moles of Na₂SO₄ dissolved in it?

• 1.5 L
• 0.060 L
• 0.67 L
• 2.3 L