Question

0.2 mole of HC1 and 0.2 mole of barium chloride were dissolved in water to produce a 500 ml solution. The molarity of the crions is :
1)0.09 M
2)0.80 M
3)0.06 M
4)1.2 M​

Answer 1

Answer:

Explanation:

=> First of all lets calculate the total number of CL- ions.

=> One mol of HCL will give one mol of H+ and one mol of CL- when dissociates. Thus, .2 mol gives .2 mol CL-

=> One mol of Bacl2 will give one mole of ba2+ and  2 mol of CL- when dissociates. Hence, 0.1 mol will give .2 mole CL-

=> So the total mols of CL- are .2+.2 = .4

=> Molarity:

molarity M = Total moles of solute/ Volume of solution in liter.

= .4/.5 = 0.8 M

Therefore, the molarity of CL- in solution is 0.8 M.