Question

Write the formulae of the following salts
by criss-cross method
a) Sodium hydrogen carbonate

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Answer 1

NaHCO3

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Answer 2

Answer:

Chemical Formulae of Sodium Bicarbonate is NaHCO₃

Explanation:

Sodium Hydrogen Carbonate is also know as Sodium Bicarbonate.

Chemical Formulae of Sodium Bicarbonate (Criss-Cross Method) -

                                             Symbol                         Valency

Sodium                                    Na                                     1

Bicarbonate                           HCO₃                                  1

1                   1

                             (Cross the valency to the opposite element/radical and

                              write it as subscripts)                      

Na             HCO₃

⇒ Na₁(HCO₃)₁ = NaHCO₃