Fundamentals J.7(c) (6th ed)

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Kevin To 1B
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Fundamentals J.7(c) (6th ed)

Postby Kevin To 1B » Wed Jul 24, 2019 6:44 pm

Question J.7(c) asks to select an acid and a base for the neutralization reaction that results in the formation of Ca(CN)2. I understand that HCN(aq) is the acid and Ca(OH)2 is the base. I am wondering if the Lewis base, CaO (calcium oxide) would also be an appropriate answer for a base?

Jennifer Zhou 1A
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Re: Fundamentals J.7(c) (6th ed)

Postby Jennifer Zhou 1A » Wed Jul 24, 2019 7:57 pm

I think it can, but requires high energy/ high temperature to react. I googled it. it needs about 700 degree Celsius to react.
CaO + 2HCN → CaCN2 + CO + H2

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Re: Fundamentals J.7(c) (6th ed)

Postby Chem_Mod » Fri Jul 26, 2019 10:01 am

A neutralization reaction is when an acid and base react to form water and a salt. HCN (aq) could react with CaO to form Ca(CN)2. However, it will not result in the formation of water.
HCN (aq) + CaO --> Ca(CN)2 + OH-
A reaction with HCN (aq) and Ca(OH)2 results in the formation of water and a salt.
HCN (aq) + CaO --> Ca(CN)2 + H20

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