What is CaCO3 known as?

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Multiple Choice

What is CaCO3 known as?

Explanation:
CaCO3 is calcium carbonate, a compound made of calcium ions and carbonate groups. The formula shows one calcium atom for every carbonate unit (CO3)2−, balancing to a neutral compound with calcium in the +2 oxidation state and carbonate carrying a −2 charge. This combination is why the substance is called calcium carbonate. You’ll find it in nature as limestone, chalk, and marble, and it’s a common buffering and scale-forming material in water systems, helping to stabilize pH and hardness. The other substances represented by the same general idea—magnesium hydroxide, sodium bicarbonate, and calcium sulfate—are different compounds with distinct properties and uses, so they don’t match CaCO3.

CaCO3 is calcium carbonate, a compound made of calcium ions and carbonate groups. The formula shows one calcium atom for every carbonate unit (CO3)2−, balancing to a neutral compound with calcium in the +2 oxidation state and carbonate carrying a −2 charge. This combination is why the substance is called calcium carbonate. You’ll find it in nature as limestone, chalk, and marble, and it’s a common buffering and scale-forming material in water systems, helping to stabilize pH and hardness. The other substances represented by the same general idea—magnesium hydroxide, sodium bicarbonate, and calcium sulfate—are different compounds with distinct properties and uses, so they don’t match CaCO3.

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