Question

Give the appropriate term defined by the statement given :
The substance that releases hydronium ion as the only positive ion when dissolved in water.

  • Acids Bases and Salts
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Answer

Acid

Reason

An acid is a compound which when dissolved in water yields hydronium ions [H3O+] as the only positively charged ion.

HCl (aq) ⇌ H+ + Cl–

H+ + H2O ⇌ H3O+ [hydronium ion]

HCl + H2O ⇌ H3O+ + Cl–

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Acids Bases and Salts

The diagram represents the preparation of sodium sulphate salt from dil. H2SO4 acid and sodium hydroxide.

1. Name the apparatus ‘A’.

2. Name the substance ‘X’ placed in ‘A’ and the substance ‘Y’ placed in B.

3. State the reason for conducting the titration using the apparatus ‘A’ and ‘B’.

4. State which solution is transferred to the evaporating dish and evaporated to point of crystallization for obtaining the salt.

5. State why titration is not conducted for the preparation of copper [II] sulphate crystals by neutralization.

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