CHEM110 ; PAST EXAM QUESTION PDF

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School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban General Principles of Chemistry – CHEM110 Tutorial 2 27 February and 1 March 2019

1.

Complete the following table using the Periodic table: Symbol

59

Co 2

Protons

16

76

16

Neutrons

16

116

16

Electrons

18

Net Charge

2.

2+

Calculate the average atomic mass of Mg given the following data: Isotope 24Mg 25Mg 26Mg

3.

16

%abundance 78.90 10.00 11.10

Mass /u 23.985045 24.985839 25.982595

Name the following compounds a) Cl2O7 b) Li2SO4 c) Br2O d) AgClO

4.

Give the chemical formula for each of the compounds listed below. a) Tetraphosphorus hexoxide b) Iron(II) hydrogen sulfate

c) Sulphur trioxide d) Zinc phosphate e) Silver perchlorate

5.

Assign oxidation states to the element in bold for the following compounds: a) K2Cr2O7 b) Ba(NO3)2 c) NF3 d) (NH4)2SO4

6.

Balance the following equations: a)

Al + HCl → H2 + AlCl3

b)

Hg(OH)2 + H3PO4 → Hg3(PO4)2 + H2O

c)

FeS + O2 → Fe2O3 + SO2

d)

KClO3 + P4 → P4O10 + KCl...