**This Powerpoint specifically uses the Cambridge iGCSE Chemistry Syllabus and covers all criteria for – Unit
**

Students will be able to -

Core
1 Describe the characteristic properties of acids
in terms of their reactions with:
(a) metals
(b) bases
© carbonates

2 Describe acids in terms of their effect on:
(a) litmus
(b) thymolphthalein
© methyl orange

3 State that bases are oxides or hydroxides of
metals and that alkalis are soluble bases

4 Describe the characteristic properties of bases
in terms of their reactions with:
(a) acids
(b) ammonium salts

5 Describe alkalis in terms of their effect on:
(a) litmus
(b) thymolphthalein
© methyl orange

6 State that aqueous solutions of acids contain
H+
ions and aqueous solutions of alkalis contain
°¿±á–
ions

7 Describe how to compare hydrogen ion
concentration, neutrality, relative acidity and
relative alkalinity in terms of colour and pH
using universal indicator paper

8 Describe the neutralisation reaction between an
acid and an alkali to produce water,
H+ (aq) + °¿±á– (aq) → H2O(l)

9 Define acids as proton donors and bases as
proton acceptors

10 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

11 State that hydrochloric acid is a strong acid,
as shown by the symbol equation,
HCl(aq) → H+
(aq) + Cl
–
(aq)

12 State that ethanoic acid is a weak acid,
as shown by the symbol equation,
CH3COOH(aq) ⇌ H+
(aq) + CH3COO–
(aq)

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

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