Question

salt analysis of copper sulphate​

Answer 1

Answer:

concerned with qualitative testing for CuSO4 which is soluble in water producing copper(II) ions & sulfate ions in solution.

The sample, under testing, is placed in water & then divided into two halves.

The first half is tested by adding few drops of sodium hydroxide solution. Formation of blue precipitate is indicative of the presence of Cu2+.

To the second half, add few drops of aqueous solution of barium chloride. Formation of white precipitate indicates that it is barium sulfate implying the presence of SO42-.

Answer 2

Answer:

Identifying the cations and anions found in the copper sulphate salt requires analysis. The charge of copper (Cu2+) and the anion of sulphate are present in copper sulphate (SO42-).

To perform salt analysis of copper sulphate, the following steps can be followed:

• In a test tube, place a tiny amount of copper sulphate and a few drops of weak hydrochloric acid (HCl). Smoke emissions show that carbonate is present (CO32-). But no gas is evolved in the instance of copper sulphate.
• After that, add a few droplets of a solution containing barium chloride (BaCl2). If a whitish precipitate appears, there is sulphate present (SO42-).
• Add a few droplets of potassium ferrocyanide (K4Fe(CN)6) solution to the test tube to check for copper (Cu2+). Any reddish-brown sediment that forms is a sign that copper is present.
• Add a few drops of ammonium hydroxide (NH4OH) solution to the test tube to prove the presence of copper. Copper is present if the precipitate dissolves and turns into a rich blue solution.

In general, copper sulphate salt analysis entails the use of particular reagents and observations to identify the cations and anions contained in the compound.

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