Question

write a formula of compound mention the valencies of element and radical for a.magnesium sulphate b. copper carbonate​

Answer 1

Answer:

Solution



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(a) Magnesium chloride = MgCl2

(b) Calcium oxide = CaO

(c) Copper nitrate = Cu(NO3)2

(d) Aluminium chloride = AlCl3

(e) Calcium carbonate = CaCO3

Video Explanation

Answer 2

Answer:

Valency of Magnesium (Mg)=2 ; Valency of Sulfate (SO

4

)=2

Interchanging their valencies and simplifying (on dividing by 2), formula for magnesium sulfate is MgSO

4.

Note that 1 magnesium ion [Mg

2+

] and 1 sulfate ion [SO

4

2−

are present in an electrically-neutral molecule of magnesium sulfate [MgSO

4.