If hydrogen chloride gas is bubbled into the equilibrium system shown above, the equilibrium will shift to the and the colour will

$12$

The following data were collected at the endpoint of a titration performed to find the molarity of an $HCl$ solution.

Volume of acid $(HCl)$ used $=14\mathrm{.}4mL$

Volume of base $(NaOH)$ used $=22\mathrm{.}4mL$

Molarity of standard base $(NaOH)=0\mathrm{.}20M$

What is the molarity of the acid solution?

A$.1\mathrm{.}6M$

B$.0\mathrm{.}64M$

C$.0\mathrm{.}31M$

D$.0\mathrm{.}13M$

$\frac{?}{1}$

$14.$ A chemistry student is given the task of accurately and precisely determining the amount concentration of a hydrochloric acid solution so it can be used as a standard solution. She chooses sodium carbonate to prepare her initial primary solution.

a$)$ What mass of pure dry sodium carbonate will she require to prepare $100\mathrm{.}0ml$ of $0\mathrm{.}120mo\frac{l}{L}$ solution? $[1\mathrm{.}27g]$

$13$

b$)$ Write the steps for a complete procedure for her titration.