An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

Question

Quizplus · Accepted Answer

The initial solution has 10% solids, so for every 100 kg of solution, there are 10 kg of solids. If 30000 kg of water is evaporated, the remaining solution must contain 40% solids. Let x be the initial amount of solution. Then, 0.1x = 0.4(x - 30000). Solving for x gives x = 40000 kg, so the amount of solids is 0.1 * 40000 = 4000 kg.

An Evaporator While Concentrating an Aqueous Solution from 10 to 40