Question

why ammonium hydroxide is added in drops followed by acetic acid to copper sulphate solution ​

Answer 1

Answer:

The reaction between ammonium hydroxide and copper sulphate is a double displacement reaction and the equation for this can be written ...When ammonium hydroxide is added in the solution of copper sulfate drop-wise, a pale blue precipitate of copper hydroxide is obtained. ... When ammonium hydroxide is added in excess, the precipitate dissolves and gives a deep blue solution of tetraammine copper (II) sulfate

Explanation:

State your observations when ammonium hydroxide solution is added drop by drop and then in excess to each of the following solutions: ... i) When NH4OH is added to copper sulphate solution drop-wise, a pale blue ppt. is obtained. CuSO4 +2NH4OH ---> Cu(OH)2 +(NH4)2SO4 +4H2O. With an excess of NH4OH, the ppt