Question

explain an activity to show the reaction of bases with metals

Answer 1

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When an acid combines with metal it forms salt and release hydrogen gas

Metal + acid – metal salt + H2

2Na + H2Co3 – Na2Co3 + H2

When a base combine with metal it forms metal salt / base and release hydrogen gas

 

Base + metal – base/metals/salt + H2

 

2NaoH + Zn – Na2ZnO3 + H2 (sodium Zincates)

Base reacts only with zinc and aluminum

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Acides Bases and Salts, Base

HOW DO ACIDS AND BASES REACT WITH METALS?

HOW DO ACIDS AND BASES REACT WITH METALS?

When an acid combines with metal it forms salt and release hydrogen gas

Metal + acid – metal salt + H2

2Na + H2Co3 – Na2Co3 + H2

When a base combine with metal it forms metal salt / base and release hydrogen gas

 

Base + metal – base/metals/salt + H2

 

2NaoH + Zn – Na2ZnO3 + H2 (sodium Zincates)

Base reacts only with zinc and aluminum

 

How do metal carbonate and hydrogen carbonate react with acids to give a corresponding salt, carbon dioxide and water?

 

All metal carbonates and hydrogen carbonate react with acids to give a corresponding salt, carbon dioxide and water

 

Metal carbonate / metal hydrogen carbonate + acid – salt +CO2 + H2O

 

Na2CO3 + 2HCl – 2Nacl + H2O + CO2

NaHCo2 + Hcl – H2O + H2O + CO2

Limestone, chalk and marble are different form of calcium carbonate

 

How do acids and bases react with each other?

 

When acids react with bases it forms salt and water

 

Acid + base – salt + water

NaOH + Hcl – Nacl + H2O

The reaction between an acid and a base to give salt and water is called neutralization reaction

In this reaction the effect of a base is nullified by and acid and vice-Vera

Reaction of metallic oxides with acids

When acid reacts with metallic oxide then it forms corresponding salt and water

Metal oxide + acid – salt + water

CuO + H2SO4 – CuSO4 + H2O

Acids react with metallic oxides to give salt and water similar to the reaction acid and base So, metallic oxides are called basic oxide

Reaction of a Non – metallic oxide with base

When base reacts with non-metallic oxide then it forms salt and water

Non – metallic oxide + base – salt + water

Ca (OH)2 + CO2 – CaCO3 + H2O

This reaction is like acid and base So, non – metallic oxides are acidic in nature

What do all acids and all bases have in common?

All acids have H+ ions in common and all bases have OH- ions in common

What happens to an acid or a base in a water solution?

When an acid is mixed in water it dissociates H+ions

Hcl + H2O – H3O+ +cl-

Hydrogen ions cannot exist alone so, it combines with water molecules and forms H3O+ions called hydronium

When a base is mixed with water it dissociate OH- ions

NaOH (s) H2O Na + (aq) + OH- (aq)

KOH (s) H2O K + (aq) + OH- (aq)


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