Solution Concentration

Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

• 30

• 25

• 20

• 15

What mass of solute is needed to make 75.0 g of a 3.4% solution?

• 2.55 g
• 22 g
• 0.05 g

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?

• 0.58%
• 0.0058%
• 5.8%

Brass is a copper-zinc alloy. If the concentration of zinc is relatively low, the brass has a golden color and is often used for inexpensive jewellery. If a 35.0 g pendant contains 1.7 g of zinc, what is the percentage mass by mass of zinc in brass?

• 2.3
• 10.1
• 7.6
• 4.9

What mass, in grams, of sodium sulfate is needed to make 275 g total of a 1.5% aqueous solution of sodium sulfate?

• 6.0

• 7.5

• 4.1

• 2.2

Tags

NGSS.HS-PS1-7

What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water?

• 2 ppm

• 20 ppm

• 200 pm

• 0.2 ppm

A 2400 gram sample of an aqueous solution contains 0.012 gram of NH₃. What is the concentration of NH₃ in the solution, expressed as parts per million?

• 5.0 ppm

• 15 ppm

• 20. ppm

• 50. ppm

An aqueous solution contains 300. parts per million of KOH. Determine the number of grams of KOH present in 1000. grams of this solution.

• 0.3 g

• 3.0 g

• .000003 g

• 300 g

Calculate the mass of solid sodium sulfate (Na₂SO₄) for the preparation of 250 mL solution of 25 ppm Na₂SO₄.

• 100 g

• 6.25 mg

• 6.25 g

• 100 mg

Tags

NGSS.HS-PS1-7

What is the concentration, in ppm, of lead in a 6.0 kg solution that contains 12 mg of lead?

• 1.0 ppm

• 2.0 ppm

• 3.0 ppm

• 4.0 ppm

Tags

NGSS.HS-PS1-7