Q22 of 203 Page 151

Name the following compounds. Also write the symbols/formulae of the ions present in them:

(a) CuSO4 (b) (NH4)2SO4


(c) Na2O (d) Na2CO3


(e) CaCl2

(a) Copper sulphate; Cu2+ and

(b) Ammonium sulphate;


(c) Sodium oxide; Na+ and O2-


(d) Sodium carbonate; Na+ and


(e) calcium chloride; Ca2+ and Cl-


More from this chapter

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20

Work out the formulae for the following compounds:

(a) Sodium oxide


(b) Calcium carbonate

 21

Calculate the formulae masses of the following compounds:

(i) Sodium oxide, Na2O


(ii) Aluminium oxide, Al2O3


(Given: Atomic masses: Na = 23 u; O = 16 u; Al = 27 u)

 23

Write the cations and anions present, if any, in the following:

(a) CH3COONa (b) NaCl


(c) H2 (d) NH4NO3

 24

Give the formulate of the compounds formed from the following sets of elements:

(a) calcium and fluorine


(b) hydrogen and sulphur


(c) nitrogen and hydrogen


(d) carbon and chlorine


(e) sodium and oxygen


(f) carbon and oxygen