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Question

State two chemical properties each with equations of a solution containing (i) H+ ions (ii) OH- ions

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Answer

(i) Chemical properties of a solution containing H+ (acids) are as follows —

  1. Neutralization — acids neutralizes base to give salt and water only.
    Example : CuO + H2SO4 ⟶ CuSO4 + H2O
  2. Reaction with active metals — Acids react with active metals [e.g., Mg, Al, Zn, Fe] to liberate hydrogen.
    Example : Zn + 2HCl ⟶ ZnCl2 + H2

(ii) Chemical properties of a solution containing OH (bases/alkalis) are as follows —

  1. Neutralization — Alkalis neutralize acids to form salt and water.
    Example :
    Ca(OH)2 + 2HCl ⟶ CaCl2 + 2H2O
  2. Reaction with metallic salt — Alkalis react with certain matallic salt solutions to precipitate insoluble hydroxide.
    Example :
    FeCl3 + 3NaOH ⟶ 3NaCl + Fe(OH)3 ↓ red brown ppt.

💡 Some Related Questions

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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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