Question 5

 (a) (i) Define standard electrode potential.

(ii) State two factors that affect the value of standard electrode potential.

(iii) Give two uses of the values of standard electrode potential.

(iv) Draw and label a diagram for an electrochemic cell made up of Cu\(^{2+}\)/Cu; E° = +0.34 V  Zn\(^{2+}\)/Zn; E° = -0.76 V

(v) Calculate the e.m.f. of the cell in (a)(iv) above.

(b) (i) In terms of electron transfer, define: I. oxidation; II. oxidizing agent.

(ii) Balance the following redox reaction: MnO\(^{-4}\) + l\(^{-}\) \(\to\) l\(_{2}\) + Mn\(^{2+}\)

(c) Classiify each of the following oxides as basic, amphoteric, acidic or neutral: (i) Carbon (II) oxide; (ii) Sulphu (IV) oxide; (iii) Aluminium oxide; (iv) Lithium oxide.

(d) What is hydrogen bonding?

Theory

Question details

Exam body
WAEC
Subject
Chemistry
Year
2012
Question no.
#5
Type
Theory

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