Temporary hardness in groundwater is caused by the dissolution of certain alkaline earth metal compo — s Block Elements Chemistry Question
Question
Temporary hardness in groundwater is caused by the dissolution of certain alkaline earth metal compounds. Which of the following chemical equations represents the formation of temporary hardness?
Answer: C
💡 Solution & Explanation
Temporary hardness is caused by dissolved calcium and magnesium bicarbonates. It occurs when rainwater containing dissolved atmospheric $CO_2$ passes over insoluble limestone ($CaCO_3$) rocks, converting the insoluble carbonate into the highly soluble bicarbonate ($Ca(HCO_3)_2$).
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