Question

Calculate the number of atoms needed to balance the following equation: CaCO3+HCl->CO2+H2O+CaCl. (Number 3 on my paper)

Answer 1

Your question is wrong CaCl2 is correct
:CaCO3+2HCl---> CO2+ H2O+CaCl2

Answer 2

CaCO3 + 2HCL -> CO2 +H2O + CaCl2

Step-by-step explanation:

When balancing an equation, it is important to first ensure that the chemical formulas in the equation are correct. In the above equation, the first modification required is for CaCl to be corrected to CaCl2. This is because the calcium ion has a charge of 2+ which has to be balanced by 2 chloride ions, each of charge 1-

Next, the overall atoms of the equations should be balanced. The number of atoms of each element on the side of reactants should be equal to their number on the side of the products. In this case, the number of HCL molecules should be 2.

Before balancing equation:

Reactants: Ca: 1, C: 1, O: 3, H: 1, Cl: 1

Products: Ca: 1, C: 1, O: 3, H: 2, Cl: 1

After balancing equation:

Reactants: Ca: 1, C: 1, O: 3, H: 2, Cl: 2

Products: Ca: 1, C: 1, O: 3, H: 2, Cl: 2