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strojnjashka [21]
3 years ago
15

When calcium metal is placed in water, hydrogen gas bubbles out, leaving a highly alkaline (basic) solution. Write the balanced

chemical equation for this reaction. Phases are optional. Do not write an ionic equation (i.e., the answer should not show any charges).
Chemistry
1 answer:
Blababa [14]3 years ago
5 0

Answer:

Ca (s) + 2H₂O (l) →  Ca(OH)₂ (aq)  +  H₂ (g)

Explanation:

When solid calcium reacts with water, it produces the correspondent hydroxid and hydrogen gas.

The hydroxid which is produced, is the calcium hydroxid which is a strong base, that's why you talk about a highly alkaline solution.

Ca (s) + 2H₂O (l) →  Ca(OH)₂ (aq)  +  H₂ (g)

Calcium hydroxide is a strong base, that dissociates in water, as this:

Ca(OH)₂  →  Ca²⁺ (aq)  + 2OH⁻ (aq)

It's a basic solution,  is providing hydroxyl ions to the medium

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