IGCSE Revision Notes The characteristic properties of acids and bases

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Syllabus Objectives

IGCSE: Acids, bases and salts

Sub Topic:6.4 Redox

Syllabus Objectives:

CORE:

Describe the characteristic properties of acids in terms of their reactions with:
(a) metals
(b) bases
(c) carbonates
Describe acids in terms of their effect on:
(a) litmus
(b) thymolphthalein
(c) methyl orange
State that bases are oxides or hydroxides of metals and that alkalis are soluble bases
Describe the characteristic properties of bases in terms of their reactions with:
(a) acids
(b) ammonium salts
Describe alkalis in terms of their effect on:
(a) litmus
(b) thymolphthalein
c) methyl orange
State that aqueous solutions of acids contain H⁺ ions and aqueous solutions of alkalis contain OH^– ions
Describe how to compare hydrogen ion concentration, neutrality, relative acidity and relative alkalinity in terms of colour and pH using universal indicator paper
Describe the neutralisation reaction between an acid and an alkali to produce water, H⁺ (aq) + OH^–(aq) ? H₂O(l)

EXTENDED:

Define acids as proton donors and bases as proton acceptors
Define a strong acid as an acid that is completely dissociated in aqueous solution and a weak acid as an acid that is partially dissociated in aqueous solution
State that hydrochloric acid is a strong acid, as shown by the symbol equation, HCl(aq) ? H⁺(aq) + Cl ^–(aq)
State that ethanoic acid is a weak acid, as shown by the symbol equation, CH₃COOH(aq) ? H⁺ (aq) + CH₃COO^– (aq)

Revision Notes

Acids bases and salts igcse chemistry

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