Reading Solubility Curve Graphs
How to read the solubility curve graph:
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Find the curve for the compound in question
Move left/right along the x-axis (bottom of the chart) to determine the desired temperature
Move up until you intersect the curve for the compound you are being asked about
Once you reach the curve, look at the corresponding number on the y-axis (left edge of the chart)
This number tells you how much compound is soluble in 100 g (mL) of water
1 gram H2O = 1 mL H2O
therefore
100 g H2O = 100 mL H2O
Example: How much KNO3 would be soluble in 100 g of H2O at 50°C?
Answer: 90 g