Question

Reaction of zn with dil HCl and NaOh solution show it experiment or explain the experiment

Answer 1

Hydrochloric acid reacts with zinc metal to produce zinc chloride and hydrogen gas. The reaction is given below:

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

Hydrochloric acid reacts with Na2CO3 to produce carbon dioxide and turns the lime water milky as it forms calcium carbonate. The milkiness formed is disappeared when more than necessary carbon dioxide is passed through the solution. The reaction is as follows:

Na2CO3(s/aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g)

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq)

• Procedure

1. Take a flat bottom flask with 1 gm of solid sodium carbonate and some distilled water.
2. Take a clean and dry double bore cork and thistle funnel which has a delivery tube fitted to it.
3. Close the mouth of flat flask with the double bore cork.
4. Add 2 mL of dilute hydrochloric acid.
5. Colourless and odourless gas is liberated which is passed through the lime water using the delivery tube.
6. The colour of the lime water is changed to milky.

• Reaction:

Na2CO3(s/aq) + 2HCl(aq) –→ 2NaCl(aq) + CO2↑+ H2O(l)

Ca(OH)2(aq) + CO2↑ –→ CaCO3(s) + H2O(l)

CaCO3(s) + H2O(l) + CO2(g) –→ Ca(HCO3)2(aq)

Mark brainlist and give thanks