Question

Question #556a0

Answer 1

See Below.

Explanation:

The UNBALANCED equation is :-

`MgO + HCl = MgCl_2 + H_2O`

So, To balance the equation, we must follow the rule of conservation of mass, as mass can't be destroyed or created.

(It's not exactly true though, Einstein's `E = mc^2` shows that)

We can see that there is only 1 `Cl` is L.H.S, but 2 in R.H.S.; same goes for `H`.

So, we can multiply `HCl` by 2 to overcome the problem.

(This is not actually multiplying, it is increasing the mole ratio to adjust the mass before and after the reaction.)

So, The final equation becomes,

`MgO + 2HCl = MgCl_2 + H_2O`

Hope this helps.