The maximum mass of a solid that dissolves in 100 g100\text{ g}100 g of water at a given temperature is called its solubility.
The table gives the solubility of salt Y at six different temperatures.
| Temperature in ∘C^\circ\text{C}∘C | 15 | 25 | 35 | 45 | 55 | 65 |
|---|---|---|---|---|---|---|
| Solubility in g per 100 g100\text{ g}100 g of water | 18 | 24 | 32 | 42 | 55 | 71 |
Plot the points on the grid and draw a curve of best fit.
Extend your curve to find the solubility of salt Y at 5∘C5^\circ\text{C}5∘C.
Use your graph to find the maximum mass of salt Y that could dissolve in 250 g250\text{ g}250 g of water at 40∘C40^\circ\text{C}40∘C.
