Sodium bicarbonate is a chemical compound widely used in household baking, fire extinguish… — State PSC Exam

Sodium bicarbonate is a chemical compound widely used in household baking, fire extinguishers, and antacids. Which of the following chemical formulas correctly represents sodium bicarbonate?

$\text{NaHCO}_3$ Answer
B
$\text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O}$
C
$\text{NaOH}$
D
$\text{CaOCl}_2$

Answer

The chemical formula representing sodium bicarbonate (baking soda) is

\text{NaHCO}_3

The chemical formula

\text{NaHCO}_3

represents sodium bicarbonate (also called sodium hydrogen carbonate), commonly known as baking soda.

Step-by-Step Solution

Identify the chemical name and constituent ions

Sodium bicarbonate is composed of sodium ions (

\text{Na}^+

) and hydrogen carbonate/bicarbonate ions (

\text{HCO}_3^-

Chemical names directly correspond to the constituent cations and anions.

Combine the ions to write the neutral chemical formula

Combining

\text{Na}^+

and

\text{HCO}_3^-

gives

\text{NaHCO}_3

The charges

+1

and

-1

balance directly in a 1:1 ratio.

Key Concept

Chemical Nomenclature and Daily Life Applications of Sodium Compounds

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