Q. The two metal ions that cause hardness to water are: (Solved)
1. Calcium, Magnesium
2. Sodium, Calcium
3. Sodium, Potassium
4. Sodium, Magnesium
- a. Calcium, Magnesium
1. Calcium, Magnesium
2. Sodium, Calcium
3. Sodium, Potassium
4. Sodium, Magnesium