What are the uses of limestone and the reaction between calcium metal and water?

March 29, 2026Chemistry

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2 stepsMarch 29, 2026

a) • Manufacture of glass • Water softening

b) Limestone ( $\text{CaCO}_3$ )

a) Gas F is hydrogen ( $\text{H}_2$ ).

b) The reaction between calcium metal and water produces calcium hydroxide, $\text{Ca(OH)}_2$ . $\text{Ca}(s) + 2H_2O(l) \rightarrow Ca(OH)_2(aq) + H_2(g)$ Calcium hydroxide is a strong base, but it has low solubility in water. This means that only a small amount of it dissolves to produce hydroxide ions ( $\text{OH}^-$ ), resulting in a solution that is weakly alkaline.

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8. a) • Manufacture of glass • Water softening b) Limestone (CaCO_3) 9.

Asked on March 29, 2026Chemistry

This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.

ScanSolve AI AnswerAnswered on March 29, 2026

8. a) • Manufacture of glass • Water softening b) Limestone (CaCO_3) 9. a) Gas F is hydrogen (H_2). b) The reaction between calcium metal and water produces calcium hydroxide, Ca(OH)_2. Ca(s) + 2H_2O(l) → Ca(OH)_2(aq) + H_2(g) Calcium hydroxide is a strong base, but it has low solubility in water. This means that only a small amount of it dissolves to produce hydroxide ions (OH^-), resulting in a solution that is weakly alkaline.