When a small amount of solid calcium phosphide (Ca3P2) is added to water, what are the most likely products formed?
A
Aqueous Ca2+ and OH− ions and PH3 gas
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B
Aqueous Ca2+ and OH− ions and H3PO3
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C
Solid CaH2 and H3PO3
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D
Solid CaO and PH3 gas
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Solution
The correct option is A Aqueous Ca2+ and OH− ions and PH3 gas Calcium phosphide reacts vigorously with water to generate phosphine gas. Ca3P2(s)+6H2O(l)⟶3Ca(OH)2(aq.)+2PH3(g)