A solution contains 28% phosphoric acid by mass. This means that .
A) 1 mL of this solution contains 28 g of phosphoric acid
B) the density of this solution is 2.8 g/mL
C) 1 L of this solution has a mass of 28 g
D) 100 g of this solution contains 28 g of phosphoric acid
E) 1 L of this solution contains 28 mL of phosphoric acid

Question

Quizplus · Accepted Answer

28% phosphoric acid by mass means that 100 g of this solution contains 28 g of phosphoric acid. Therefore, option D is the correct answer. Option A is incorrect because 1 mL of this solution will not necessarily contain 28 g of phosphoric acid since the density of the solution is not given. Option B is incorrect because the given concentration does not determine the density of the solution. Option C is incorrect because 1 L of this solution will not necessarily have a mass of 28 g since the density of the solution is not given. Option E is incorrect because 1 L of solution cannot necessarily contain 28 mL of phosphoric acid since the density of the solution is not given.

A Solution Contains 28% Phosphoric Acid by Mass