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01/11/2020 11:20 am
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(a) Explain the following chemical properties of acids with the help of balanced chemical equations only.
(i) When an acid reacts with a metal carbonate.
(ii) When an acid reacts with a metal bicarbonate.
(iii) When an acid reacts with a metal oxide.
(b) You are given three solutions A, B and C with pH values 2, 10 and 13 respectively. Write which solution has more hydrogen ion concentration among the three and state the nature ‘acidic or basic’ of each solution.
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01/11/2020 11:41 am
(a) (i) CaCO3 + 2HCl → CaCl2 + H2O + CO2
(ii) NaHCO3 + HCl → NaCl + H2O + CO2
(iii) Al2O3 + 6HCl → 2AlCl3 + 3H2O
(b) 'A' has maximum [H3O+] equal 10-2 mol L-1
'A' is acidic whereas B and C are basic in nature.