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It's a common ion in tap water. It's also what causes what most people call "hard water stains." It's that white chalky stuff that builds up around your sink.

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Q: Why you consider calcium carbonate as a standard to measure water hardness?
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What is soft made of?

Calcium Carbonate, with a hardness rating of 3.


What is soft scrub made of?

Calcium Carbonate, with a hardness rating of 3.


What causes permanent hardness of water?

Presence of bicarbonates of chlorides or sulphates of calcium or magnesium in water are the main causes of hardness of water.


Why is CaCO3 taken as reference to measure hardness of water?

Because calcium carbonate is the most important impurity in water to produce hardness.


Why all the hardness of water is expressed in terms of Calcium carbonate?

because its molecular weight is 100.....


What is the name of the formula CaCO3?

The name of the chemical formula CaCO3 is calcium carbonate. Calcium carbonate is commonly found in rocks and is created when ions in hard water react with carbonate ions to create limescale. The hardness of water is measures in ppm CaCO3.


The hardness of bone is due to what?

The hardness of bone is due to the calcium salts deposited in it.The exceptional hardness of bone, which allows it to resist compression, is attributed to the presence of inorganic hydroxyapatites. Hydroxyapatites such as calcium phosphates are particularly important for bone hardness. Organic substances such as collagen fibers contribute to tensile strength, but not to hardness.the presence of inorganic hydroxyapatites.


What other substances cause permanent hardness?

Temporary hardness of water is due to the presence of calcium hydrogentrioxocarbonate(IV) which decompose on heating.when this water is heated calcium trioxocarbonate(iv) is form as insoluble and this brings the ca+ out of the solution as precipitate.once the ca+ re out of the solution soap can now lather well.


Is the carbonate or the calcium the buffer in calcium carbonate?

The carbonate. Calcium is neutral.


What is the IUPAC name for the compound CaCO3?

Calcium Carbonate :)


What are the two form of hardness found in water?

Hardness in water is usually characterised as temporary or permanent. Both are due to the presence of calcium or magnesium ions. If they are present as the hydrogen carbonate, when the water is boiled this is converted to the carbonate which precipitates out as a solid, leaving water which is no longer hard, so this is called temporary hardness. If they are present as the sulfate the solution is unaffected by boiling, and this is called permanent hardness.


What is limestone calcium carbonate or calcium sulfate?

Calcium carbonate.