What type of reaction is this: #HCN + NH_2^(-) rightleftharpoons CN^(-) + NH_3#?

Answer 1

This is an acid base reaction.

Amide ion is unstable in aqueous solution and is typically formed by the addition of sodium or potassium metal to liquid ammonia, which is fairly easy to manipulate in a laboratory. Amide ion is the base and reacts with hydrogen cyanide, the acid, to give ammonia and cyanide anions:

#NH_3(l) + Na(s) rarr NH_2^(-) + Na^(+) + 1/2H_2(g)uarr#

When a piece of metal is added to the solvent, a deep blue color appears quickly; this is thought to be the result of a solvated electron with a long lifetime in ammonia; when the electrons stand, they are thought to couple and produce a bronze color.

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Answer 2

Natalie Anton

This is a Lewis acid-base reaction.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.