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Questions and Answers
Which of the following equations can be used to calculate the hardness of water in terms of calcium carbonate?
Which of the following equations can be used to calculate the hardness of water in terms of calcium carbonate?
- \(\text{Hardness (in terms of calcium carbonate)} = \frac{\text{Concentration of calcium sulphate}},{\text{Molar mass of calcium sulphate}}\)
- \(\text{Hardness (in terms of calcium carbonate)} = \frac{\text{Concentration of calcium carbonate}},{\text{Molar mass of calcium sulphate}}\)
- \(\text{Hardness (in terms of calcium carbonate)} = \frac{\text{Concentration of calcium sulphate}},{\text{Molar mass of calcium carbonate}}\) (correct)
- \(\text{Hardness (in terms of calcium carbonate)} = \frac{\text{Concentration of calcium carbonate}},{\text{Molar mass of calcium carbonate}}\)
What is the concentration of calcium sulphate in the water sample?
What is the concentration of calcium sulphate in the water sample?
- 204 mg/L (correct)
- 204 mg/mL
- 204 g/L
- 204 kg/L
What is the molar mass of calcium carbonate?
What is the molar mass of calcium carbonate?
- 136.14 g/mol
- 40.08 g/mol
- 58.44 g/mol
- 100.09 g/mol (correct)
