Washing Soda Identification

The question asks to identify the common name for Washing Soda among the given options. Washing Soda is a widely used chemical compound, particularly in households for cleaning purposes. Understanding its chemical identity is key to answering this question correctly.

Chemical Identity of Washing Soda

Washing Soda is the common name for the chemical compound Sodium carbonate. Its chemical formula is $Na_2CO_3$. It is an alkali salt and is known for its cleaning properties, ability to soften water, and use in laundry detergents.

Analysis of Options

Let's examine each option provided:

• Calcium carbonate: This is commonly known as limestone, chalk, or marble. Its chemical formula is $CaCO_3$. It is not Washing Soda.
• Potassium carbonate: Also known as potash, its chemical formula is $K_2CO_3$. While it is an alkali carbonate, it is different from Washing Soda and is not its common name.
• Sodium carbonate: This is the correct chemical name for Washing Soda ($Na_2CO_3$).
• Magnesium carbonate: This compound has the chemical formula $MgCO_3$. It is found naturally and is not Washing Soda.

Conclusion

Based on the chemical identity and common names, Washing Soda is unequivocally Sodium carbonate.