To determine the solubility of KNO3 at the given temperatures using a graph, follow these steps:
Step 1: Locate the temperatures on the x-axis of the graph (40°C, 50°C, and 70°C).
Step 2: For each temperature, move vertically up from the x-axis until you reach the curve representing the solubility of KNO3.
Step 3: From the point on the curve, move horizontally to the y-axis to find the solubility value in grams per 100 mL of water.
Using the graph, we can find the solubility of KNO3 in 100 mL of water at the given temperatures:
At 40°C: Approximately __ grams of KNO3 can be dissolved.
At 50°C: Approximately __ grams of KNO3 can be dissolved.
At 70°C: Approximately __ grams of KNO3 can be dissolved.
*Note: Replace the "__" with the actual values from your graph, as these values may vary depending on the specific graph you are using.