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Control And Coordination

Question

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Write the balanced chemical equations for the reactions that take place when zinc, magnesium and sodium react with dilute hydrochloric acid.

Solution

Metal react with acid gives salt and hydrogen gas.

Reaction of zinc with hydrochloric acid.
Zn + 2HCl

\underset{}{\to}

ZnCl₂ +H₂

Reaction of magnesium with hydrochloric acid.
Mg +2HCl

\underset{}{\to}

MgCl₂ +H₂

Reaction of Sodium with hydrochloric acid.
2Na +2HCl

\underset{}{\to}

2NaCl +H₂

Some More Questions From Control and Coordination Chapter

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.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

Why the vessels of copper and brass need ‘Kalai’?

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