Mg + HCl ----> MgCl2 + H2

If the water in tube is evaporated , the other product , a white salt remains . Write the balanced chemical equation .

Ans: Mg + HCl ----> MgCl2 + H2 + H2O
I don't know how to balanced it . I'm confusing where O is in reactants to balanced.
Thanks for helping !!!

To balance the chemical equation, we need to make sure that the number of atoms of each element is equal on both sides of the equation.

In the given reaction:
Mg + HCl -> MgCl2 + H2 + H2O

We can see that there is an extra oxygen (O) atom on the right side of the equation due to the presence of water (H2O).

To balance the equation, we can add the appropriate coefficient in front of H2O on the left side of the equation. The coefficient should be such that the number of oxygen atoms is the same on both sides.

Since there is one oxygen atom in H2O, we can add a coefficient of 1 in front of H2O on the left side of the equation:

Mg + HCl + H2O -> MgCl2 + H2 + H2O

Now, let's balance the number of hydrogen and chlorine atoms:

On the left side:
H: 2 (from HCl) + 2 (from H2O) = 4
Cl: 1 (from HCl)

On the right side:
H: 2
Cl: 2 (from MgCl2)

To balance the hydrogen atoms, we can add a coefficient of 2 in front of HCl on the left side:

Mg + 2HCl + H2O -> MgCl2 + H2 + H2O

Now the equation is balanced. The balanced equation is:
Mg + 2HCl + H2O -> MgCl2 + H2 + H2O

To balance the equation, we need to ensure that the number of atoms for each element is the same on both sides of the equation. In this case, we have hydrogen (H) and oxygen (O).

Since there are two hydrogen atoms on the reactant side (HCl), we need to have two hydrogen atoms on the product side as well. We already have one from the formation of H2 gas, so we need another.

To do this, we can add water (H2O) to the product side, as it contains both hydrogen and oxygen atoms. Let's balance the equation:

Mg + 2HCl → MgCl2 + H2 + H2O

Now, the equation is balanced with two hydrogen atoms on both sides. The balanced equation represents the reaction between magnesium (Mg) and hydrochloric acid (HCl) to produce magnesium chloride (MgCl2), hydrogen gas (H2), and water (H2O).