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Keith_Richards [23]
3 years ago
5

What initially forms as pale blue and pale green precipitate when nh3 is added to cuh2o6?

Chemistry
2 answers:
andre [41]3 years ago
7 0
The chemical equation that shows the reaction between nh3 and cuh206 is detailed as: [Cu(H2O)6]2+ (aq) + 2NH3(aq). —> [Cu(OH)2(H2O)4](s) + 2NH4 + (aq). the blue precipitate is Cu(OH)2(H2O)4 in which the blue color is caused by the Cu present in the solid.
GenaCL600 [577]3 years ago
5 0

Answer:

Light blue colored precipitate of copper hydroxide, [Cu(OH)₂(H₂O)₄]

Explanation:

In an aqueous solution, copper (II) exists as hexaaquacopper(II) ion, having the molecular formula [Cu(H₂O)₆]²⁺.

When ammonia (NH₃) is reacted with hexaaquacopper(II) ion, [Cu(H₂O)₆]²⁺, a <u>light blue colored precipitate of </u><u>copper hydroxide</u>, [Cu(OH)₂(H₂O)₄] is formed, which is soluble in excess ammonia.

Reaction: [Cu(H₂O)₆]²⁺ (aq) + 2NH₃(aq) → [Cu(OH)₂(H₂O)₄](s) (↓) + 2NH₄⁺(aq)

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The answer to this question would be: 2.36 mol

To answer this question, you need to know the molecular weight of copper. Molecular weight determines how much the weight of 1 mol of a molecule has. Copper molecular weight about 63.5g/mol. Then, the amount of mol in 150g copper should be: 150g / (63.5g/mol)= 2.36 mol
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Answer:

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