Answer:
THE MOLARITY OF THE SOLUTION IS 0.1368 mol/dm3
Explanation:
Molarity is the number of moles of the solute per litre of the solution.
It is expressed as;
Molarity in mol/dm3 = Molarity in g/dm3 / Relative molecular mass
Step 1: obtain the molarity in g/dm3
4.6 g of CuCl2 in 250 mL solution
4.6 / 250 * 10^-3
= 4.6 / 0.25
= 18.4 g/dm3 of CuCl2
Step 2: calculate the relative molecular mass of CuCl2
( Cu = 63.5 , Cl = 35.5)
RMM = 63.5 + 35.5 *2
= 63.5 + 71
= 134.5 g /mol
Step 3: Calcullate molarity in mol/dm3
Molarity in mol/dm3 = molarity in g/dm3 / RMM
= 18.4 g/dm3 / 134.5 g/mol
= 0.1368 mol/dm3
So therefore, the molarity of CuCl2 is 0.1368 mol/dm3
