Question

Zn+2HCl---ZnCl2+H2
in the reation, the reactant is
(H2,Zn,ZnCl2)​

Answer 1

What is the balance form of Zn + HCl -> ZnCl2 + H2

Balanced Equation:

            Zn + 2HCl ⇒ ZnCl2 + H2

                   ↓                   ↓

             Reactant       Product

            Zn = 1                   1

            H = 1 x 2 = 2        2

            Cl = 1 x 2 = 2       2

             

We need to balance the equation in every  chemical reaction since according to the law of conservation of mass, "during chemical reaction, atoms are not destroyed or change" which means, the mass of reactant will always be equal to the mass of the product.

In balancing, we can add the coefficient which is the number before the element or the compound in the equation. coefficient also must be a whole number not a fraction or decimal number.