Question

16.Na2CO3 + 2HCl -------> 2NaCl + H2CO3 is an example of :​

Answer 1

Answer:

Explanation:

. When solutions of sodium carbonate and hydrochloric acid are

mixed, the equation for the hypothetical double displacement reaction is:

Na2CO3 + 2 HCl à 2 NaCl + H2CO3

Bubbles of a colorless gas are evolved when these solutions are mixed. Although this gas

is evidence of a chemical reaction, neither of the indicated products is a gas. But carbonic

acid, H2CO3, is an unstable compound and readily decomposes into carbon dioxide and

water.

H2CO3 à H2O + CO2 (g)

Therefore, CO2 and H2O are the products that should be written in the equation. The

original equation then becomes

Na2CO3 (aq) + 2 HCl (aq) à 2 NaCl (aq) + H2O (l) + CO2 (g)

The complete ionic equation for this reaction is:

2 Na+

(aq) + CO3

2-

(aq) + 2 H+

(aq) + 2 Cl-

(aq) à 2 Na+

(aq) + 2 Cl-

(aq) + H2O (l) + CO2 (g)

The net ionic equation reaction (canceling out the spectator ions sodium ion and chloride

ion) is:

CO3

2-

(aq) + 2 H+

(aq) à H2O (l) + CO2 (g)

Examples of other substances that decompose to form gases are sulfurous acid

(H2SO3) and ammonium hydroxide (NH4OH):

H2SO3 (aq) à H2O (l) + SO2 (g)

NH4OH (aq) à H2O (l) + NH3 (g)

Answer 2

Na2CO3(Sodium Carbonate)+2HCl (Hydrochloric Acid $\sf\implies$ 2NaCl ( Sodium Chloride ) + H2CO3(Carbonic acid) is a Double Displacement Reaction.

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because in this chemical reaction the reactant ions exchange places to form new products

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Hope it helps you

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