Question

How many grams of KI can be dissolved in 300gH2O at 10C?

Answer 1

• About 408g of KI can be dissolved in 300 g of water at 10ºC.

Step-by-step explanation:

Look at the graph attached. It contains the solubility curves for severals solutes.

I have marked the solubility of KI at 10ºC: look the intersection of the vertical and horizontal dotted red lines: the corresponding solubility is read on the vertical axis. It is slightlly above the midpoint between 130 y 140 g per 100 g of water. Thus, you can approximate to 136 g / 100 g of water.

You need the number of grams dissolved in 300 g of water, thus mutilply by 300:

`(136g)/(100gH_2O)* 300gH_2O=408g`

Thus, about 408g of KI can be dissolved in 300 g of water at 10ºC.