Question

7. Write a balanced equation for the preparation of hydrogen from a solution of potassium
hydroxide (other than by electrolysis).
8. Sodium or potassium is not used with dilute HCl or H2SO4 for the laboratory preparation
of hydrogen. Give reason.
9. For the preparation of hydrogen in the laboratory:
(i) List the materials needed
(ii) Write the chemical equation
(iii) Draw a labelled diagram
(iv) Name the impurities formed​

Answer 1

Answer:

2KCl+2H2O=2KOH+Cl2+H