Question

0.5 mole of calcium carbonate is decomposed by an aqua solution containing 25% HCL by mass calculate the mass of solution consumed​

Answer 1

Answer : The mass of solution consumed is, 146 grams.

Explanation :

The balanced chemical reaction will be,  

$CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O$

First we have to calculate the moles of HCl.  

As, 1 mole $CaCO_3$ reacts with 2 mole HCl

So, 0.5 mole $CaCO_3$ reacts with $\frac{2}{0.5}=1$ mole HCl

Now we have to calculate the mass of HCl.

$\text{Mass of HCl}=\text{Moles of HCl}\times \text{Molar mass of HCl}$

Molar mass HCl = 36.5 g/mole

$\text{Mass of HCl}=1mole\times 36.5g/mole=36.5g$

Now we have to calculate the mass of solution.

As, 25 grams of HCl is consumed in 100 grams of solution

So, 36.5 grams of HCl is consumed in $\frac{100}{25}\times 25=146g$ of solution

Therefore, the mass of solution consumed is, 146 grams.

Answer 2

Answer:

Explanation:

See the attachment