Question

9. How many grams of zinc are needed to produce 12 grams of zinc chloride according to the following equation? Y-

Answer 1

Given :

A balanced chemical equation :

$Zn +Cl_2->ZnCl_2$

To Find :

How many grams of zinc are needed to produce 12 grams of zinc chloride.

Solution :

Moles of $ZnCl_2$ ,

$n=\dfrac{Given \ wt}{Molecular\ Mass}\\\\n =\dfrac{12}{136.30}\ mol\\\\n=0.088\ mol$

Now, by balanced chemical equation we can say that 1 mol of Zn produce

1 mol of $ZnCl_2$ .

So, 0.088 mol of Zn is required to produced 0.088 mol of $ZnCl_2$ .

$Mass \ required = molecular \ mass \times moles\\\\m = 65.38 \times 0.088\\\\m=5.8 \ gm$

Therefore, 5.8 grams of zinc is required.

Hence, this is the required solution.