Question

(a) Complete the following equations (i) nCHZ = CHZ —> .................(ii) CH 3—C002H + NaHCO3 —> ........ + ...... +. (b) What is the cause of hardness of water? Why soap do not form lather with hard water? Mention the disadvantage of cleaning clothes with soap in hard water ?

Answer 1

Answer:

this is acid base reaction here CH3COOH is acid and NaHCO3 is base

hence salt form. i.e.

CH3COOH+NaHCO3----> CH3COONa +H20 +CO2

Explanation:

Half of this is a double displacement reaction.

The reaction takes place in two steps.

Step 1

CH₃COOH(aq) + NaHCO₃(s) → CH₃COONa + H₂CO₃(aq)

This is a double displacement reaction because the Na trades partners with the H of CH₃COOH.

Step 2

The carbonic acid formed in Step 1 decomposes into CO₂ and water.

H₂CO₃(aq) → CO₂(g) + H₂O(l)

This is a decomposition reaction, because one substance is converted into two different substances.

Overall Reaction

If you add the two equations together, the H₂CO₃ cancels out, and you get

CH₃COOH(aq) + Na₂CO₃(s) → CH₃COONa(aq) + CO₂(g) + H₂O(l)