What is the product of a reaction of calcium carbonate, water and carbon dioxide?

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 08 Dec 2022 Shift 1)

Answer 1

The correct answer is Calcium hydrogen carbonate

Key Points

Calcium hydrogen carbonate
- Ca(HCO3)2 is the chemical formula for calcium bicarbonate, often known as calcium hydrogencarbonate.
- It only exists in aqueous solutions containing calcium (Ca2+), bicarbonate ions, and dissolved carbon dioxide; the word does not refer to a known solid substance (CO2).
- The pH affects the relative quantities of these carbon-containing species, with bicarbonate predominating in fresh water between 6.36 and 10.25.

Additional Information

The majority of natural waters that are drawn from streams, lakes, and especially wells can be thought of as diluted solutions of these bicarbonates because all waters that come into contact with the atmosphere absorb carbon dioxide.
As these waters interact with rocks and sediments they pick up metal ions, most frequently calcium and magnesium.
These hard fluids often result in carbonate scale building up in boilers and pipes, and when they interact with soap, they create an unfavourable scum.