When acidified copper sulphate solution is electrolysed oxygen is obtained at the anode. What arrangements are to be made for this? Find the element deposited at the cathode.

When NH_4 OH is added to copper sulphate solution, blue colour is obtained due to formation of

When NH_4OH is added to copper sulphate solution, blue colour is obtained due to formation of

A solution of Ni(NO_3)_2 is electrolysed between platinam electrodes using a current of 5 am^- peres for 20 minutes. What mass of N i is d e posited at the cathode?

Copper sulphate solution (250 mL) was electrolysed using a platinum anode and a copper cathode. A constant current of 2 mA was passed for 16 minutes. It was found that after electrolysis, the absorbance of the solution was reduced to 50 % of its original value. Calculate the concentration of copper sulphate in the solution to begin with.

Assertion : If an aqueous solution of NaCl is electrolysed, the product obtained at the cathode is hydrogen gas and not Na. Reason: Gases are liberated faster than the metals.

When an aqueous solution of sulphuric acid is electrolysed, the ion discharged at the anode is : Hydrogen, Sulphate, Hydroxyl, Oxygen

Sodium chloride solution is electrolysed us-ing platinum electrodes: What happens when phenolpthalein is ad ded to-the solution? State the reason?

Keep two carbon rods immersed in copper sulphate solution. Then pass electricity through the solution. i) At which electrode does colour change occur-anode or cathode? ii) Is there any change in the blue colour of the copper sulphate solution? iii) Write down the chemical equations for the changes occurring here?