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Course: Class 10 Chemistry (India) > Unit 2

Lesson 6: Chemicals from common salt
Science
Class 10 Chemistry (India)
Acids, bases, and salts
Chemicals from common salt
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Identify molecular formula of salts from common names (recall)

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Let's recall the molecular formula of chemicals from their common names.
Salt is an ionic compound formed by the neutralization reaction of an acid and a base.
In daily life, we come across different salts that we use for cooking, baking, in the manufacture of detergents, to support fractured bones, etc. Mostly, we know them by their common names or trivial names. In this article, let's try to recall the molecular formula of the chemicals from their common names.
  1. Baking soda is a salt. It got its name "baking" as we use them for baking and "soda" as it gives out carbon dioxide gas − just like carbonated drinks, soda.
Adding a small amount of baking soda makes a cake soft and fluffy.
Baking soda kept in a glass jar. Image credit: Monfocus from Pixabay.
What is the molecular formula of the baking soda?
  1. Rock salt occurs naturally as white crystals. We extract it from its mineral form, halite, or by evaporating seawater.
Halite. Image credits: Roberto Saltori from Flickr.com
What is the molecular formula of rock salt?
  1. Plaster of Paris (POP) is a white powder. It was extensively mined from Montmartre in the Paris district, hence the name.
Today, doctors use it to support fractured bones.
What is the molecular formula of Plaster of Paris?
  1. Historically, washing soda was extracted from the ashes of plants growing in sodium-rich soils.
It is used in the manufacture of detergents.
What is the molecular formula of washing soda?
  1. Bleaching powder − a white powder − is used to disinfect drinking water, bleach laundry clothes, etc.
Bleach is the generic name for any chemical product used industrially and domestically to remove the color from fabric or fiber.
What is the molecular formula of bleaching powder?
  1. The word gypsum is derived from the Greek word gypsos, which means plaster.
It is used in the manufacture of cement.
What is the molecular formula of gypsum?

Summary

Let's summarize by moving the molecular formula of the chemicals next to their correct common names.
1

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