Question

Assessment
1. Explain the reaction of acids with metals with an example,
2. Explain the reaction of bases with metals with an example
3. Explain neutralization reaction with an example
1. Acid - Metal
Salt
B) Base
A) Water
5. Acid + Base
C) Oxygen
+ Water
D) Hydrogen
A) Salt
D) Water
B) Oxygen
Metal
C) Hydrogen
Salt + Hydrogen
6.
A) Acid
B) Some Bases
C) A and B
D) Non metal
* * * * *​

Answer 1

Answer:

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Explanation:

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Answer 2

How Does Metal React With Acid?

Acids react with most metals to form hydrogen gas and a salt. Nevertheless, not all metals react in the same way to acids, and some metals are more resistant than others to corrosion. When an acid reacts with metal salt and hydrogen gas are produced. Metals which are more active than acids may experience a single displacement reaction.

Example

Zinc powder reacts with hydrochloric acid that releasesH2 gas and zinc chloride.

Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

Reaction of Base with Metals:

When alkali (base) reacts with metal, it produces salt and hydrogen gas.

Alkali + Metal ⇨ Salt + Hydrogen

Example:

Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal.

2NaOH + Zn ⇨ Na2ZnO2 + H2

Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

2NaOH + 2Al + 2H2O ⇨ 2NaAlO2 + 2H2

Neutralisation Reaction:

An acid neutralizes a base when they react with each other and salt and water are formed.

Acid + Base ⇨ Salt + Water

Examples

Sodium sulphate and water are formed when sulphuric acid reacts with sodium hydroxide (a base).

H2SO4 + 2NaOH ⇨ Na2SO4 + 2H2O

In similar way, when nitric acid reacts with sodium hydroxide, sodium nitrate and water are formed.

HNO3 + NaOH ⇨ NaNO3 + H2O

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