Question

Са СаО Са(ОН)2 Са(NО3)2 СаСО3

Answer 1

2Ca + O2 = 2CaO

CaO + H2O = Ca(OH)2

Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O

Ca(NO3)2 + Na2CO3 = 2NaCO3 + CaCO3

Answer 2

The chemical formulas you provided represent different chemical compounds containing calcium (Ca) and oxygen (O) along with other elements. Here's a brief explanation of each compound:

1. CaO: Calcium Oxide Calcium oxide is also known as quicklime. It is a white, alkaline, and caustic solid compound. When water is added to calcium oxide, it undergoes a vigorous exothermic reaction and forms calcium hydroxide (Ca(OH)2).

2. Ca(OH)2: Calcium Hydroxide Calcium hydroxide, also known as slaked lime, is a white, alkaline solid compound. It is formed when water reacts with calcium oxide. It is commonly used in various applications, including as a cement additive, in the treatment of water and wastewater, and in some medicinal uses.

3. Ca(NO3)2: Calcium Nitrate Calcium nitrate is a water-soluble compound that contains calcium and nitrate ions. It is often used as a fertilizer in agriculture to provide plants with essential nutrients like calcium and nitrogen.

4. CaCO3: Calcium Carbonate Calcium carbonate is a white, insoluble compound found in various natural sources like limestone, chalk, and marble. It is used in many industrial applications, including as a filler in paints, plastics, and paper, as well as in antacid medications.

It's important to note that the chemical formulas you provided are not balanced equations, but they represent the individual compounds themselves. If you need any specific information about these compounds or related chemical reactions, feel free to ask!