Solution Concentration Problems

What is the mass percent sugar in a solution made of 100 g of sugar and 400 g of water?

• 30

• 25

• 20

• 15

What is the molarity of 4 g of NaCl (MM=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 (MM = 58.45)?

• 0.625 g NaCl
• 625 g NaCl
• 36.5 g NaCl
• 0.04 mol NaCl

Tags

NGSS.HS-PS1-7

_________________________ is the number of moles of a solute dissolved per liter of solution.

• Mass percent

• Molality

• Concentration

• Molarity

When calculating molarity the unit for volume is _________.

• milliliters

• liters

• grams

• moles

How many grams of sodium hydroxide should be used to prepare 500 ml of 0.1 M solution? (Na:23 O:16 H:1)

• 20

• 8

• 4

• 2

Tags

NGSS.HS-PS1-7

What is the mathematical formula for % mass?

• % = (mass of solute/mass of solvent) x 100

• M=mol of solute/ L of solvent

• %=(mass of solute/mass of solution) x 100

• M = mol of solute/L of solution

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.07 gram
• 62.7 mol
• 1.07 mol
• 62.7 grams

Molarity is measured in

• moles per kg
• mols per L
• moles per kJ
• moles per mL

The ___ is the thing being dissolved

• solute
• solvent