What Will be the effect of these salts using either blue or red litmus paper on hydrolysis?

Copper chloride (CUCl2)
Copper sulphate (CUSO4)
Barium chloride (Bacl2)
Ammonium chloride (NH4Cl)

consider how they were formed and the reverse equilibrium reaction:

Cu(OH)2 + 2HCl >> CuCl2 + 2H2O The reverse reaction will be strong acid, weak base, so litmus will be red
Cu(OH)2 + H2SO4>>CuSO4 + 2H2O... reverse reaction produces strong acid, weak base, litmus red.
NH4 (OH) + HCl >>NH4CL + H2O reverse, acid.

https://www.jiskha.com/questions/1795599/What-will-be-the-effect-of-these-salts-using-either-blue-or-red-litmus-paper-on-hydrolysis

To determine the effect of these salts on hydrolysis, we first need to understand the concept of hydrolysis. Hydrolysis is a chemical reaction in which a compound reacts with water to form other compounds. It involves the breaking of bonds within a molecule by the addition of water.

To use litmus paper to test the effect of these salts on hydrolysis, we need to know that litmus paper is an indicator used to test the acidity or basicity of a substance. Blue litmus paper turns red in the presence of an acidic solution, while red litmus paper turns blue in the presence of a basic solution.

Now let's analyze the effect of each salt on hydrolysis using blue and red litmus paper:

1. Copper chloride (CuCl2):
Copper chloride is a salt formed by the combination of copper and chloride ions. When dissolved in water, it will dissociate into copper ions (Cu2+) and chloride ions (Cl-). Neither copper nor chloride ions are known to significantly affect the pH of a solution. Therefore, copper chloride will have little to no effect on hydrolysis, and both blue and red litmus paper should remain unchanged.

2. Copper sulphate (CuSO4):
Copper sulphate is formed by the combination of copper and sulphate ions. When dissolved in water, it will dissociate into copper ions (Cu2+) and sulphate ions (SO42-). Similar to copper chloride, neither copper nor sulphate ions are expected to significantly affect the pH of a solution. Hence, copper sulphate will likely have little effect on hydrolysis, resulting in no observable change in the color of both blue and red litmus paper.

3. Barium chloride (BaCl2):
Barium chloride is comprised of barium and chloride ions. When dissolved in water, it will dissociate into barium ions (Ba2+) and chloride ions (Cl-). Barium ions can be slightly acidic, but the chloride ions balance their impact, making the overall effect on pH minimal. Thus, barium chloride is not expected to have a significant effect on hydrolysis, and both blue and red litmus paper should remain unchanged.

4. Ammonium chloride (NH4Cl):
Ammonium chloride is formed by the combination of ammonium and chloride ions. When dissolved in water, it will dissociate into ammonium ions (NH4+) and chloride ions (Cl-). The ammonium ion (NH4+) can undergo hydrolysis and release hydrogen ions (H+), making the solution slightly acidic. This will cause blue litmus paper to turn red, indicating acidity. Red litmus paper, which is used to detect bases, will remain unchanged as ammonium chloride does not possess significant basic properties.

In summary, the salts copper chloride, copper sulphate, and barium chloride are not expected to have a substantial effect on hydrolysis. Hence, they should not cause any observable color change when tested using blue or red litmus paper. On the other hand, ammonium chloride is slightly acidic due to hydrolysis of the ammonium ion, resulting in a color change of blue litmus paper to red.