Editing Calcium carbonate
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==What is it?== | ==What is it?== | ||
− | '''Calcium carbonate''' ({{CaCO3}}) is a chemical compound. It is commonly used medically as a calcium supplement or as an antacid. It is also a common substance found as rock (like marble) in all parts of the world and so is often found in nature dissolved in water which flows over these rocks. It is therefore the | + | '''Calcium carbonate''' ({{CaCO3}}) is a chemical compound. It is commonly used medically as a calcium supplement or as an antacid. It is also a common substance found as rock (like marble) in all parts of the world and so is often found in nature dissolved in water which flows over these rocks. It is therefore the principle cause of hard water. |
{{CaCO3}} is the main building block of seashells and the shell of snails and all shrimps. So [[Coral sand]] is mostly {{CaCO3}}. | {{CaCO3}} is the main building block of seashells and the shell of snails and all shrimps. So [[Coral sand]] is mostly {{CaCO3}}. |