Question

work out the formula for magnesium hydrogen carbonate

Answer 1

Mg(HCO3)2 .

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Answer 2

The worked out chemical formula of magnesium hydrogen carbonate is $Mg(HCO_3)_2$.

• To write the formula of the compound the symbol, as well as the valency of the constituents elements, identification is required.
• Accordingly, magnesium hydrogen carbonate is composed of element magnesium (Mg) and group called hydrogen carbonate $(HCO_3)$.

• The valency of magnesium and hydrogen carbonate is 2 and 1 respectively.

• To derive the chemical formula of given compound the constituents elements and their valency must be written in the following pattern:

Symbol:  Mg     $HCO_3$

Valency: 2         1

• When the symbol and valency are cross multiplied it leads to the formula as $Mg(HCO_3)_2$.

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