ED-Concentration

What is the concentration of a solution, in parts per million, if 0.02 gram of Na₃PO₄ is dissolved in 1000 grams of water?

• 20 ppm

• 0.2 ppm

• 0.02 ppm

• 2 ppm

How many grams of NaCl are needed to be dissolved in water to make 1.0 gram of a 100.0 ppm solution?

• 1.0 x 10⁻⁴ g

• 1.0 x 10⁻² g

• 1.0 x 10⁻³ g

• 1.0 x 10⁻¹ g

What is the concentration expressed in parts per million of a solution containing 5.0 grams of NH₄Cl in 95.0 grams of H₂O?

• 5.0 x 10⁴ ppm

• 2.0 x 10⁷ ppm

• 5.3 x 10⁷ ppm

• 1.9 x 10⁷ ppm

Which solution is the most concentrated?

• 1 mole of solute dissolved in 1 liter of solution

• 2 moles of solute dissolved in 3 liters of solution

• 6 moles of solute dissolved in 4 liters of solution

• 4 moles of solute dissolved in 8 liters of solution

Which solution is most concentrated?

• 0.1 mole of solute dissolved in 400 ml of solvent

• 0.2 mole of solute dissolved in 300 ml of solvent

• 0.3 mole of solute dissolved in 200 ml of solvent

• 0.4 mole of solute dissolved in 100 ml of solvent

What is the total number of moles of NaCl(s) needed to make 3.0 liters of a 2.0 M NaCl solution?

• 6.0 mol

• 8.0 mol

• 2.0 mol

• 0.70 mol

What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution?

• 1 M

• 2 M

• 0.04 M

• 0.5 M

What is the molarity of a solution of NaOH if 2 liters of the solution contains 4 moles of NaOH?

• 0.5 M

• 2 M

• 8 M

• 80 M

How many moles of solute are contained in 200 milliliters of a 1 M solution?

• 1

• 0.2

• 0.8

• 200

What is the molarity of a solution that contains 0.50 mole of NaOH in 0.50 liter of solution?

• 1.0 M

• 2.0 M

• 0.25 M

• 0.50 M