Question

Write the chemical reactions which take place in mond process for refining of nickel

Answer 1

Answer:for refining nickel mond process is used as nickel oxide The nickel oxide and impurities react with the hydrogen gas to form an impure solid nickel. Nickel reacts with the carbon monoxide, forming nickel carbonyl, a gas

Explanation:the chemical reaction that take place during mond process are as follows:

This process has three steps:

1. Nickel oxide reacts with syngas at 200 °C to give nickel, together with impurities including iron and cobalt.

NiO(s) + H2(g) → Ni(s) + H2O(g)

2. The impure nickel reacts with carbon monoxide at 50–60 °C to form the gas nickel carbonyl, leaving the impurities as solids.

Ni(s) + 4 CO(g) → Ni(CO)4(g)

3. The mixture of nickel carbonyl and syngas is heated to 220–250 °C, resulting in decomposition back to nickel and carbon monoxide:

Ni(CO)4(g) → Ni(s) + 4 CO(g)