Question

0.5 mole of HCl and 0.5 mole of Barium chloride
were dissolved in water to produce 2 L solution.
The molarity of Clºis
1.5 M
0.75 M
3 M
1 M​

Answer 1

Explanation:

First calculate total number of cl- ions.

One mole Nacl will dissociate to give one mole Na+ and one mole cl-. So .2 mole will give .2 mole cl-

One mole bacl2 will dissociate to give one mole ba2+ and 2 mole cl-. So .2 mole will give .4 mole cl-

So the total moles of cl- are .4+.2=.6

Molarity is total moles of solute divided by volume of solution in L. So the molarity is .6/.5= 1.2M