Question

An aqueous solution with chlorine 30 g/L and an organic compound with no chlorine at the rate 50 L/min were put into an extraction machine and produced aqueous solution with chlorine 5 g/L and organic compound with chlorine 10 g/L, what is the rate of aqueous solution?

(a) 10 L/min

(b) 20 L/min

(c) 30 L/min

(d) 40 L/min

This question was posed to me by my college professor while I was bunking the class.

My question is from Solving Material Balance Problems for Single Units in section A General Strategy for Solving Material Balance Problems and Solving Material Balance Problems for Single Units of Basic Chemical Engineering

Answer 1

Correct answer is (c) 30 L/min

The best I can explain: Let the rate of an aqueous solution be x. Chlorine balance equation, x(30) + 50(0) = x(5) + 50(10), => x = 20 L/min.