Chemistry
State what will be the effect of each of the following solution on blue litmus —
(i) K2CO3 soln.
(ii) KCl soln.
(iii) NH4NO3 soln.
Acids Bases Salts
15 Likes
Answer
(i) As K2CO3 is a salt of a strong base (KOH) and weak acid (H2CO3), it hydrolyses in water to give alkaline solutions. They have pH more than 7, hence it will have no effect on blue litmus.
(ii) KCl is a salt of a strong acid (HCl) and a strong base (KOH). Hence it's aqueous solution will be neutral in nature and will have no effect on blue litmus.
(iii) NH4NO3 is a salt of a strong acid (HNO3) and weak base (NH4OH), it hydrolyses in water to give an acidic solution. They have pH less than 7, hence will turn blue litmus red.
Answered By
7 Likes
Related Questions
Give balanced equations for the decomposition of
- calcium bicarbonate by dil. HCl
- calcium carbonate by dil. HNO3
- sodium sulphite by dil. H2SO4
- zinc sulphide by dil. H2SO4.
Give balanced equations for the preparation of the following salts –
(a) (i) CuSO4
(ii) NaHSO4
(iii) Na2SO4
(iv) FeSO4
(v) BaSO4
(vi) PbSO4 — using dil. H2SO4
(b) (i) NaHSO4
(ii) CuSO4 — using conc. H2SO4
Starting from insoluble ZnO how would you obtain insoluble ZnCO3 by precipitation.
Give balanced equations for the action of a dilute acid on
(i) zinc carbonate,
(ii) potassium bicarbonate for the preparation of the respective salt.