Question

Solubility of one salt in water is 42g/100g at 20°c. what mass of this salt would be needed to produce saturated solution containing 50g of water at 20°c​

Answer 1

Answer:

You can determine how many grams of sodium chloride, commonly known as table salt, can be dissolved in

100 g

of water at

80

∘

C

by taking a look at its solubility graph.

A substance's solubility graph tells you how its solubility changes, let's say starting from room temperature, when temperature is either decreased or increased.

Explanation:

As you can see, at room temperature sodium chloride has a solubility of approximately

35 g/100 g H

2

O

.

As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than

40 g

of sodium chloride per

100 g

of water at

80

∘

C

.

So, at

80

∘

C

, you will ahve an unsaturated solution if you dissolve less than

40 g

of sodium chloride, and a saturated solution if you dissolve about

40 g

of sodium chloride