Question

write the formula of the following salts by criss-cross methods- 1) sodium hydrogen carbonate 2)ferrous sulphate 3) aluminium nitride 4) potassium sulphate 5) ammonium chloride 6) lead nitrate 7) ammonium phosphate 8) cupric oxide 9) calcium hydrogen sulphate10) zine hydroxide.

Answer 1

Dear Student,

1) Sodium Hydrogen carbonate

Symbol Na HCO₃
Charge +1 -1

Formula = NaHCO₃

2) Ferrous sulphate

Symbol Fe SO₄
Charge +2 -2

Formula = FeSO₄

​3) Aluminium nitride

Symbol Al N
Charge +3 -3

Formula = AlN

4) Potassium sulphate

Symbol K SO₄
Charge +1 -2

Formula = K₂SO₄

​5) ammonium chloride

Symbol NH₄ Cl
Charge +1 -1

Formula = ​NH₄Cl

6) Lead Nitrate

Symbol Pb NO₃
Charge +2 -1

Formula = Pb(NO₃)₂

7) ammonium phosphate

Symbol NH₄ PO₄
Charge +1 -3

Formula = ​(NH₄)₃PO₄

​8) Cupric oxide

Symbol Cu O
Charge +2 -2

Formula = ​Cu₂O₂ = CuO

9) Calcium hydrogen sulphate

Symbol Ca HSO₄
Charge +2 -1

Formula = ​Ca(HSO₄)₂

10) Zinc hydroxide

Symbol Zn OH
Charge +2 -1

Formula = ​Zn(OH)₂

Best Wishes !