A chemist has a 20% acid solution and a 50% acid solution (percentages by volume). - Form and solve

Question

A chemist has a 20% acid solution and a 50% acid solution (percentages by volume). - Form and solve a pair of simultaneous equations to find how many litres of each solution must be mixed to make 30 litres of a 30% acid solution. - Explain why no mixture of these two solutions can be a 60% acid solution. - Find the volume of water that must be added to the 30 litres of 30% solution to make a 25% solution.

Accepted Answer

(a) $20$ litres of $20\%$ and $10$ litres of $50\%$ (b) a mixture's concentration lies between $20\%$ and $50\%$ (c) $6$ litres

Mixing two acid solutions

Mixing two acid solutions

Solution:

Solution locked