What is the maximum amount of potassium nitrate (KNO3) that can dissolve in 100 grams of water at 40°C?

A.
25 grams

B.
50 grams

C.
62 grams

D.
75 grams

62 gram

Explanation:

Using attached solubility graph

This solubility graph tells us the amount of potassium nitrate that can be dissolved per 100g of water in order to have a saturated solution of potassium nitrate at a given temperature.

In order to find the solubility of the salt at 40∘C, start from the 40∘C mark on the graph and move up until you intersect the curve. At the point of intersection, move left until you intersect the y axis and read off the value that you land on.

In this case, you can estimate that the solubility of potassium nitrate in water at 40∘C is equal to about 62g

This tells you that a saturated solution of potassium nitrate will hold about 62 g of dissolved salt, i.e. of dissociated salt, per 100g of water at 40∘C.

Please find the attached file for the graph.

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

power out to power in less than 100%