Activity for reactions of acids with metal bicarbonate.

Question

Describe an activity with diagram to illustrate the reaction of metal carbonate or metal bicarbonate with acids produces carbon dioxide. Write the relevant equations to all the reactions that take place. Name any two forms in which Calcium carbonate is found in the nature.

Answer 1

Aim: To show acid reacts with metal carbonate to liberate carbon dioxide,

Material  Required: Na₂CO₃, Woulfe-bottle, thistle funnel, dil. HCl, gas jar, matchbox, delivery tube bent at two right angles, lime water. 

Procedure:

1. Take two test tubes, label them as A and B. Take about 0.5 g of sodium carbonate (Na₂CO₃) in test tube A and about 0.5 g of sodium hydrogen carbonate (NaHCO₃) in test tube B.
2. Add about 2 mL of dilute ethanoic to both the test tubes.
3. Pass the gas produced in each case through lime water (calcium hydroxide solution) as shown in below figure and record your observations.

Reactions involved:

2NaHCO₃ + H₂SO₄ → NaSO₄ + 2H₂O + 2CO₂

Na₂CO₃+ H₂SO₄→ Na₂SO₄+ H₂O + CO₂

when ethanoic acid reacts with sodium carbonate, then carbon dioxide gas is evolved.