1. After boiling the temporary hard water and adding soap solution, you will notice that the water will produce more lather or foam compared to before boiling. This is because boiling has removed some of the minerals that cause hardness in water.

2. The water is less hard after boiling. This is because the process of boiling can remove temporary hardness in water.

3. This type of hardness is called "temporary hardness" because it can be removed by boiling. The minerals that cause temporary hardness, usually calcium and magnesium bicarbonates, can be precipitated out of the water by boiling.

4. Other substances that cause temporary hardness include other bicarbonates and carbonates of calcium and magnesium.

5. The equation for removal of temporary hardness by heating is:
Ca(HCO3)2 (aq) → CaCO3 (s) + CO2 (g) + H2O (l)

6. Three other methods of removing temporary hardness in water include:
- Using a water softener, which replaces the calcium and magnesium ions with sodium ions.
- Using a reverse osmosis system, which forces water through a semi-permeable membrane that filters out the minerals.
- Using a distillation process, where water is boiled and the steam is collected and condensed, leaving the minerals behind.

Question

1. After boiling the temporary hard water and adding soap solution, you will notice that the water will produce more lather or foam compared to before boiling. This is because boiling has removed some of the minerals that cause hardness in water.

2. The water is less hard after boiling. This is because the process of boiling can remove temporary hardness in water.

3. This type of hardness is called "temporary hardness" because it can be removed by boiling. The minerals that cause temporary hardness, usually calcium and magnesium bicarbonates, can be precipitated out of the water by boiling.

4. Other substances that cause temporary hardness include other bicarbonates and carbonates of calcium and magnesium.

5. The equation for removal of temporary hardness by heating is:
Ca(HCO3)2 (aq) → CaCO3 (s) + CO2 (g) + H2O (l)

6. Three other methods of removing temporary hardness in water include:
   - Using a water softener, which replaces the calcium and magnesium ions with sodium ions.
   - Using a reverse osmosis system, which forces water through a semi-permeable membrane that filters out the minerals.
   - Using a distillation process, where water is boiled and the steam is collected and condensed, leaving the minerals behind.

Knowee AI · Accepted Answer

1. After boiling the temporary hard water and adding soap solution, you will notice that the water will produce more lather or foam compared to before boiling. This is because boiling has removed some of the minerals that cause hardness in water.

2. The water is less hard after boiling. This is because the process of boiling can remove temporary hardness in water.

3. This type of hardness is called "temporary hardness" because it can be removed by boiling. The minerals that cause temporary hardness, usually calcium and magnesium bicarbonates, can be precipitated out of the water by boiling.

4. Other substances that cause temporary hardness include other bicarbonates and carbonates of calcium and magnesium.

5. The equation for removal of temporary hardness by heating is:
Ca(HCO3)2 (aq) → CaCO3 (s) + CO2 (g) + H2O (l)

6. Three other methods of removing temporary hardness in water include:
   - Using a water softener, which replaces the calcium and magnesium ions with sodium ions.
   - Using a reverse osmosis system, which forces water through a semi-permeable membrane that filters out the minerals.
   - Using a distillation process, where water is boiled and the steam is collected and condensed, leaving the minerals behind.

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