Question

A solution contains 14 grams of KCl in 100. grams of water at 40ºC. What is the minimum amount of KCl that must be added to make this a saturated solution?

A) 14 g
B) 19 g
C) 25 g
D) 44 g

Answer 1

Option C is correct

Step-by-step explanation:

Step 1: Data given

Mass of KCl in 100 grams water = 14 grams

Temperature = 40.0 °C

At 40.0°C we need 40.1 grams of KCl in 100 grams of water to have a saturated solution

Step 2: Calculate mass KCl we have to add

Mass KCl = 40.1 grams - 14.0 grams = 26.1 grams

We have to add 26.1 grams oof KCl to have a saturated solution

Since 25 grams is the closest to this answer. Option C is correct

When adding 44 grams of KCl the solution will be oversaturated