At what temperature do KCL and KNO3 have the same solubility

If a saturated solution of KNO3 at 20.0 C is heated to 80.0 how much more could be dissolved?

If a saturated solution of KCL at 90.0 C is colled to 30.0 C how much of the solid will precipitate?

How much NaCL will dissolve in 350.0 g of water at 70.0C

How much KCL Will dissolve in 50. g of water at 50.0C

What mass of O2 can be dissolved in 2000.0 g of water at 30.0 C

Please help me work these out. I am doing a practice page before my test 2morrow and I need to know how to work them THANKS

To answer these questions, we need to understand the concept of solubility and how it varies with temperature. Solubility refers to the maximum amount of a solute that can dissolve in a given amount of solvent at a specific temperature.

1. To determine the temperature at which KCl and KNO3 have the same solubility, we need to find the solubility curves for both substances. These curves represent the relationship between solubility and temperature. By comparing the two curves, we can identify the temperature at which they intersect, indicating equal solubility.

2. For the second question, we need to compare the amount of KNO3 that can be dissolved at 20.0°C (saturated solution) with the solubility at 80.0°C. By subtracting the amount dissolved at 20.0°C from the solubility at 80.0°C, we can determine how much more KNO3 can be dissolved.

3. Similarly, for the third question, we need to compare the solubility of KCl at 90.0°C (saturated solution) with the solubility at 30.0°C. By subtracting the solubility at 30.0°C from the amount initially dissolved at 90.0°C, we can determine how much KCl will precipitate.

4. To find out how much NaCl will dissolve in 350.0 g of water at 70.0°C, we need to refer to the solubility curve for NaCl. The solubility indicates the maximum amount of NaCl that can dissolve at a given temperature. By finding the point on the curve corresponding to 70.0°C, we can determine the solubility. Multiplying the solubility by the mass of water (350.0 g) will provide the amount of NaCl that can dissolve.

5. Similarly, to determine how much KCl will dissolve in 50.0 g of water at 50.0°C, we use the solubility curve for KCl. Finding the solubility at 50.0°C and multiplying it by the mass of water (50.0 g) will give us the amount of KCl that can dissolve.

6. Finally, to find the mass of O2 that can be dissolved in 2000.0 g of water at 30.0°C, we need to know the solubility of O2 at that temperature. Multiplying the solubility by the mass of water (2000.0 g) will give us the mass of O2 that can dissolve.

By referring to the solubility curves for the respective substances, all of these questions can be answered.