This is a very math-heavy problem from the Chemistry Olympiad:
Beakers P and Q are placed side by side. Initially, P contains 100 cm³ of 1.00 M Na⁺ solution, while Q contains the same volume of 1.00 M K⁺ solution.
10.0 cm³ of P's contents are pipetted into Q which is then stirred. Then, 10.0 cm³...
The Periodic Table
The Periodic Table