Question

Ca CaO Ca(OH)2 CaCO3 CaCl2 CaCrO4

Answer 1

1) Ca + MgO = CaO + Mg

2)CaO + H2O = Ca(OH)2

3)Ca(OH)2 + CO2 = CaCO3 + H2O

4)CaCO3 + 2HCl( разбав ) = CaCl2 + CO2 + H2O

5) CaCl2 + Na2CrO4 = CaCrO4 + 2NaCl

Answer 2

MgO+Ca=CaO+Mg

CaO+H2O=Ca(OH)2

Ca(OH)2+CO2=CaCO3+H2O

CaCO3 + 2HCl(разб.) = CaCl2 + CO2↑ + H2O

CaCl2 + Na2CrO4=CaCrO4+2NaCl (Если не ошибаюсь вроде так...)

Answer 3

Chemical Compounds of Calcium

Ca (Calcium) is a chemical element with the symbol Ca and atomic number 20. It is a soft gray alkaline earth metal.

CaO (Calcium Oxide), also known as quicklime, is a widely used chemical compound. It is a white, caustic, alkaline crystalline solid at room temperature.

Ca(OH)2 (Calcium Hydroxide), commonly known as slaked lime, is a compound that is a white, caustic, crystalline solid at room temperature.

CaCO3 (Calcium Carbonate) is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite.

CaCl2 (Calcium Chloride) is an inorganic compound, a salt with the chemical formula CaCl2.

CaCrO4 (Calcium Chromate) is a yellowish solid compound.

The chemical reactions and properties of these compounds can be further explored based on specific contexts and applications.

(#1)(#3)(#4)(#5)