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Question

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Name the gas evolved when a metal carbonate or metal hydrogen carbonate reacts with acids. Explain the chemical reaction.

Solution

When metal carbonate and metal
hydrogencarbonate react with acid its gives salt, carbon dioxide and water.

Na₂CO₃ (s)+2HCl(aq)→ 2NaCl(aq) +H₂O(l) +CO₂
NaHCO₃(s)+ HCl(aq)→NaCl(aq) +H₂O(l) +CO₂
CaCO₃(s)+2HCl(aq)→CaCl₂(aq) +H₂O(l) +CO₂

Some More Questions From Control and Coordination Chapter

What are antacids?

What are olfactory indicators?

You are given the following solutions:

Hydrochloric acid (HCl), sulphuric acid (H₂SO₄), nitric acid (HNO₃), acetic acid (CH₃COOH), sodium hydroxide (NaOH), calcium hydroxide [(Ca(OH)₂], potassium hydroxide (KOH), magnesium hydroxide [Mg(OH)₂] and ammonium hydroxide (NH₄OH). Give the colour change for each of these solutions with red litmus, blue litmus, phenolphthalein and methyl orange solutions.

Choose the olfactory indicators and give their characteristics: red cabbage extract, onion, vanilla extract, litmus, clove oil.

What do you understand by concentrated and dilute acids?

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Take 5 ml hydrochloric acid in a boiling tube or a conical flask. Add a few pieces of zinc granules to it.

(a) What do you observe on the surface of zinc granules?
(b) Name the gas evolved.
(c) What happens when the above gas is passed through soap solution?
(d) What happens when a burning candle is brought near the gas filled tube?

Name four acids and bases. Write their formulae.

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