How many kilograms of acid do you need to add to one liter of water to get a 35% solution?

1. Determine how many percent of water will be contained in a 35% acid solution:

100 – 35 = 65%;

2. Determine the mass of a 35% acid solution. We take this mass as a and make up the proportion:

1 kg – 65%, and kg – 100%;

1: a = 65: 100;

a = (1 x 100): 65;

a = 1.54 kg;

3. Determine the mass of the acid that was added to the water to obtain a 35% acid solution:

1.54 – 1 = 0.54 kg.

Answer: 0.54 kilograms of acid was added to the water to make a 35% acid solution.