Problema Solution
A scientist poured a 10% KCl solution into a test tube already containing diluent. If the total volume of the mixed solution in the test tube is 200 mL and its concentration is 5%, how many milliliters of the 10% KCl solution were poured into the flask?
Answer provided by our tutors
10% KCl solution: x ml
10%x = 200*5%
x = 100
So 10% KCl solution is 100 ml