Describe an activity with diagram to illustrate that the reaction of metal bicarbonate with acids produce carbon-dioxide gas and process of testing the gas. Write the chemical equation involved in this.

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Solution

Activity:

Aim: To show acids react with metal carbonate to liberate carbon dioxide.

Materials Required: $C a C O_{3}$ (Marble Chips), Woufle-bottle, thistle, funnel, dil. HCl, gas, jar, match box, delivery tube bent at two right angles, limewater.

Procedure:

Take marble chips in a Woufle bottle.

Set the apparatus.

Add Dil. HCl with help of thistle funnel.

Collect the gas in a jar by upward displacement of air.

Bring a burning matchstick near the gas jar and record your observations.

Pass the evolved through limewater and note your observations.

Observation : Reaction of calcium carbonate with dil. HCl aid to liberate carbon dioxide as which turns limewater milky and extinguishes burning matchstick.

Chemical Reactions:
$C a C O_{3} + 2 H C l ⟶ C a C l_{2} + H_{2} O + C O_{2}$

$C a {(O H)}_{2} + C O_{2} ⟶ C a C O_{3} + H_{2} O$

Calcium Carbonate is found in nature in form of limestone, marble, chalk.

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(a) What happens when an acid reacts with a metal? Give the chemical equation of the reaction involved.

(b) Which gas is usually liberated when an acid reacts with a metal? How will you test for the presence of this gas?

Question 47
A salt X is formed and gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate. Name the salt X and the gas evolved. Describe an activity and draw the diagram of the apparatus to prove that the evolved gas is one which you have named. Also, write chemical equation of the reaction involved.

(a) What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.

(b) What happens when carbon dioxide gas is passed through lime water?

Q. (a) When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
(b) Give any two uses of ethanoic acid.

(a) What happens when dilute hydrochloric acid is added to sodium carbonate ? Write a balanced chemical equation of the reaction involved.

(b) Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate ? How will you test for the presence of this gas ?

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