Question

What is the concentration of chloride ion in molarity in a solution containing 10.56 gm of bacl2.8h2o per litre of solution?

Answer 1

Answer:- 0.060M .

Solution:- Molar mass of $BaCl_2.8H_2O$ is 352.36 gram per mol. 10.56 grams of it are dissolved per liter of solution. Molarity is moles of solute per liter of solution. So, let's convert it's grams to moles:

$10.56gBaCl_2.8H_2O(\frac{1mol}{352.36g})$

= $0.030molBaCl_2.8H_2O$

One mol of $0.030molBaCl_2.8H_2O$ has 2 moles of Cl. So, the moles of chloride ion would be two times the moles of $0.030molBaCl_2.8H_2O$ .

moles of $Cl^-$ = 2(0.030) = 0.060 mol

Volume of the solution is one liter. So, the molarity of chloride ion is 0.060 mol per liter that is 0.060M.