Hard water results from relatively high concentrations of dissolved ________.
A) calcium and magnesium
B) sodium and lithium
C) sodium
D) potassium

Question

Quizplus · Accepted Answer

Hard water is caused by the chemicals, specifically calcium and magnesium, that dissolve in the water as it moves through rocks and soil. Sodium and potassium can also result in the formation of hard water, but calcium and magnesium are the primary culprits.

Hard Water Results from Relatively High Concentrations of Dissolved ________