Chemistry
Name the ions formed when — HCl; HNO3; H2SO4; CH3COOH; NaOH and NH4OH ionise in aq. soln.
Acids Bases Salts
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Answer
(i) When HCl is dissolved in water, it is ionised into hydrogen ion [or H3O+ ion] and chloride ion.
HCl ⟶ H+ + Cl-
The H+ cannot exist independently, therefore, it combines with water molecule to form hydronium ion (H3O+)
H+ + H2O ⟶ H3O+
(ii) When HNO3 is dissolved in water, it is ionised into hydronium ion and nitrate ion.
HNO3 ⟶ H+ + NO3-
H+ + H2O ⟶ H3O+
(iii) When H2SO4 is dissolved in water, it is ionised into hydronium ion and sulphate ion.
H2SO4 ⟶ 2H+ + SO42-
H+ + H2O ⟶ H3O+
(iii) When CH3COOH is dissolved in water, it is ionised into hydronium ion and acetate ion.
CH3COOH ⟶ CH3COO- + H+
H+ + H2O ⟶ H3O+
(iii) When NaOH is dissolved in water, it is ionised into sodium ion and hydroxyl ion.
NaOH ⟶ Na+ + OH-
(iv) When NH4OH is dissolved in water, it is ionised into ammonium ion and hydroxyl ion.
NH4OH ⟶ NH4+ + OH-
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