A solution contains 33% phosphoric acid by mass. This means that ________.
A)100 g of this solution contains 33 g of phosphoric acid
B)1 mL of this solution contains 33 g of phosphoric acid
C)1 L of this solution has a mass of 33 g
D)1 L of this solution contains 33 mL of phosphoric acid
E)the density of this solution is 3.3 g/mL

Question

Quizplus · Accepted Answer

If a solution contains 33% phosphoric acid by mass, this means that 100 g of the solution contains 33 g of phosphoric acid. This is because the percentage by mass indicates the amount of solute (phosphoric acid) in a given mass of solution (100 g). Therefore, option A is correct.

Option B is incorrect because mass is not equivalent to volume, and therefore, 1 mL of the solution cannot contain 33 g of phosphoric acid.

Option C is incorrect because the mass of the solution would depend on its volume, density, and composition, and cannot be determined from the concentration alone.

Option D is incorrect because the volume of the solution that contains 33 mL of phosphoric acid would depend on its concentration and cannot be assumed from the concentration alone.

Option E is incorrect because the density of the solution is not given and cannot be calculated from the concentration alone.

A Solution Contains 33% Phosphoric Acid by Mass