%3Cp%3EA.%20Write%20the%20acid-base%20chemical%20equilibrium%20for%20the%20react

Question

%3Cp%3EA.%20Write%20the%20acid-base%20chemical%20equilibrium%20for%20the%20reaction%20of%0Aaqueous%20ammonia%20and%20water.%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3Ewrite%20the%20chemical%20equilibrium%20for%20the%20two%20reactions%20of%20aqueous%0Acopper%20ion%20with%20aqueous%20ammonia%3F%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E1.%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E2.%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3EB.%20Write%20the%20chemical%20equation%20for%20reaction%20for%20aqueous%20ammonia%0Awith%20HCl.%3C%2Fp%3E%0A%3Cp%3E%3Cbr%20%2F%3E%3C%2Fp%3E%0A%3Cp%3EWrite%20the%20chemical%20equilibrium%20equation%20for%20this%20product%20with%0Aaqueous%20copper%20ion.%3C%2Fp%3E%0A

Explanation / Answer

When copper and ammonia react we see the the very beautiful deep blue copper tetrammine complex ion ..

Cu+2(aq) + 4 NH3(aq) = Cu(NH3)4+2(aq)

There are two possible representations of this.
NH3(aq) + HCl(aq) --> NH4Cl(aq)

or NH4OH + HCl --> NH4Cl + H2O
However, this second equations is not entirely accurate as only small amounts of NH4OH will form in an ammonia solution.

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