Molarity and Dilutions Honors

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 molarity of 4 g of NaCl (FM=58.45) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (FM = 58.45)?

• 0.625 g NaCl

• 625 g NaCl

• 36.5 g NaCl

• 0.04 mol NaCl

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (FM = 342) in 250 mL of water.

• 2.18 M

• 0.746 M

• 1.18 M

• 0.545 M

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?

• .191 M

• 3.78 M

• .389 M

• 1.76 M

Drag the variables to the correct place in the formula

a

b

c

L of solution

Moles of solute

Molarity

What is the molarity of 4 g of NaCl (MM=58.45g/mol) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

Tags

NGSS.HS-PS1-7

How many grams of AgNO₃ are needed to prepare 0.125M solution in 250 mL of water? (MM 169.87g/mol)

• .03g

• 0.5g

• 5.3g

• 84.9g

Tags

NGSS.HS-PS1-5

Calculate the Molarity in a solution containing 40.0 g of NaCl dissolved in 500.0 ml of H2O.

• 0.08 M

• 12.5 M

• 1.37 M

• 0.74 M

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (MM = 342) in 250 mL of water.

• 2.18 M

• 0.746 M

• 1.18 M

• 0.545 M