Multiple choice

What volume of $0.8\ M-AICI_{3}$ solution should be mixed with $50\ ml$ of $0.2\ M-CaCl_{2}$ solution to get a solution of chloride ion concentration equal to $0.6\ M$?

  1. $5.56\ ml$
  2. $100\ ml$
  3. $50\ ml$
  4. $4.89\ ml$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The 50 ml calcium chloride solution contains 0.01 mol calcium chloride, giving 0.02 mol chloride ions. Solving 2.4V + 0.02 = 0.6(V + 0.05), with V in litres, gives V = 0.00556 litres or 5.56 ml.

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