Question

Ca- Ca(OH) -CaCI- CaCO​

Answer 1

Ca+2H2O=Ca(OH)2+H2

Ca(OH)2+2HCl=2H2O+CaCl2

CaCl2+Na2CO3=CaCO3 +2NaCl

Answer 2

Ответ:

Объяснение:

Ca + 2H2O = Ca(OH)2 + H2↑

Ca(OH)2 + 2HCl = CaCl2 + 2H2O

CaCl2 + Na2CO3 = CaCO3↓ + 2NaCl

Answer 3

It seems like you've provided a sequence of chemical symbols and formulas. I'll try to break down what each of them represents:

1. Ca - This is the chemical symbol for calcium, which is an element with the atomic number 20.

2. Ca(OH)2 - This is calcium hydroxide. It's a chemical compound consisting of one calcium (Ca) atom bonded to two hydroxide (OH-) ions. Calcium hydroxide is often used in various applications, including as a base in chemistry and in the production of cement.

3. CaCl2 - This is calcium chloride. It's a chemical compound consisting of one calcium (Ca) atom bonded to two chloride (Cl-) ions. Calcium chloride is commonly used as a desiccant (to absorb moisture), in road de-icing, and in various industrial processes.

4. CaCO3 - This is calcium carbonate. It's a chemical compound consisting of one calcium (Ca) atom bonded to one carbon (C) atom and three oxygen (O) atoms. Calcium carbonate is found in nature in various forms, including limestone, chalk, and marble. It's used in a wide range of applications, from construction to the manufacturing of calcium supplements.

If you have a specific question or need more information about these compounds, please feel free to ask!