When 200. mL of water are added to 100. mL of 12% KCl solution the final concentration of KCl is (Assume the volumes additive.)
A)12%.
B)6.0%.
C)4.0%.
D)8.0%.
E)36%.

Question

Quizplus · Accepted Answer

The initial solution has 12% KCl, meaning 12 g of KCl per 100 mL of solution. In 100 mL, there are 12 g of KCl. When 200 mL of water is added, the total volume becomes 300 mL. The concentration is then (12 g / 300 mL) * 100% = 4.0%.

When 200 ML of Water Are Added to 100