Explain the observations when aqueous ammonia is added to copper(II) sulfate solution and the reasons for…

Question

Explain the observations when aqueous ammonia is added to copper(II) sulfate solution and the reasons for using glass apparatus in the preparation of nitric acid.

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Step 1: Address question 12(a). When a few drops of aqueous ammonia are added to copper (II) sulphate solution, a pale blue precipitate of copper (II) hydroxide is formed. When excess aqueous ammonia is added, the pale blue precipitate dissolves to form a deep blue solution of tetraamminecopper(II) complex. Step 2: Address question 12(b). The substance formed when a few drops of aqueous ammonia are added is copper (II) hydroxide. Its formula is Cu(OH)₂. Step 3: Address question 13(a). All apparatus used during the preparation of nitric(V) acid are made of glass because glass is unreactive to concentrated nitric(V) acid, preventing corrosion of the apparatus and contamination of the product.

Explain the observations when aqueous ammonia is added to copper(II) sulfate solution and the reasons for using glass apparatus in the preparation of nitric acid.

Answer

Step-by-step solution

Address question 12(a).

Address question 12(b).

Address question 13(a).

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