Question

The solubility of potassium chloride in boiling water is 56.3 g/100 g water. if you add 250.0 g of potassium chloride to 50.0 g of boiling water, will the potassium chloride all dissolve?

Answer 1

No, potassium chloride will not dissolve completely. Only 28.15 g of potassium chloride will get dissolved.

Step-by-step explanation:

Amount od potassium chloride added to 50 g of boiling water = 250.0 g

The solubility of potassium chloride in boiling water is 56.3 g/100 g water.

Amount of potassium chloride soluble in 100 g of boiling water = 56.3 g

Amount of potassium chloride soluble in 1 g of boiling water =
`(56.3 g)/(100)`

Amount of potassium chloride soluble in 50.0 g of boiling water :

`(56.3 g)/(100)* 50.0 g=28.15 g`

Amount of potassium chloride left undissolved = 250.0 g - 28.15 g = 221.85 g

28.15 g of potassium chloride will dissolve and remaining 221.85 g og potassium chloride will not.

Answer 2

The solubility of KCl in boiling water is 56.3 g / 100 g water So each gram of water dissolve 56.3 / 100 = 0.563 g KCl in g water

We have here 50 g water so the total amount of KCl dissolved = 50 * 0.563 = 28.15 g KCl

We have 250 g KCl so it is not dissolved completely (only 28.15 g KCl will be dissolved)