Understanding the Chemical Name of Baking Soda

Baking soda is a common household ingredient used in baking, cleaning, and various other applications. It is known by several names, including bicarbonate of soda and sodium bicarbonate. The question asks for its chemical name, which is directly related to its chemical formula.

Let's look at the given options and identify their chemical names:

1. Na₂CO₃
2. NaHCO₃
3. CaCO₃
4. NaOH

We need to find which one corresponds to baking soda.

Analyzing the Chemical Formulas and Names

Let's break down each option:

• Option 1: Na₂CO₃
  This chemical formula represents Sodium Carbonate. Sodium carbonate is commonly known as washing soda or soda ash. It is used in detergents and as a water softener.
• Option 2: NaHCO₃
  This chemical formula represents Sodium Bicarbonate. The presence of the 'H' (hydrogen) indicates it's a bicarbonate (or hydrogen carbonate). Sodium bicarbonate is the chemical name for baking soda. When heated, it decomposes to produce carbon dioxide gas, which causes dough to rise, hence its use in baking.
• Option 3: CaCO₃
  This chemical formula represents Calcium Carbonate. Calcium carbonate is the main component of rocks like limestone, marble, and chalk. It is used in construction, as an antacid, and in toothpaste.
• Option 4: NaOH
  This chemical formula represents Sodium Hydroxide. Sodium hydroxide is a strong base commonly known as caustic soda or lye. It is used in drain cleaners, soap making, and the production of paper.

Identifying the Correct Chemical Name for Baking Soda

Based on the analysis of the chemical formulas and their corresponding names, the chemical formula for baking soda is NaHCO₃, and its chemical name is Sodium Bicarbonate.

Therefore, the chemical name corresponding to baking soda is Sodium Bicarbonate, represented by the formula NaHCO₃.

Revision Table: Common Chemicals

Additional Information on Sodium Bicarbonate

Sodium bicarbonate (baking soda), NaHCO₃, is an amphoteric compound, meaning it can react as both an acid and a base. Its mild alkaline nature makes it useful as an antacid to neutralize stomach acid. In baking, it reacts with acidic ingredients (like buttermilk, vinegar, or cream of tartar) to produce carbon dioxide gas, which creates bubbles and causes the batter to rise.

The decomposition of baking soda upon heating can be represented by the equation:

\( 2\text{NaHCO}_3\text{(s)} \xrightarrow{\Delta} \text{Na}_2\text{CO}_3\text{(s)} + \text{H}_2\text{O(g)} + \text{CO}_2\text{(g)} \)

This release of carbon dioxide gas is key to its leavening action in baked goods even without the presence of an acid, although the reaction is slower.