Question

20ml of 0.20 Al(SO4)3 is mixed with 20ml of 6.6 Mansoor BaCl2 the concentration ofCl ion in solutionis

Answer 1

BaCl2 will react with Aluminium sulphate to form precipitate of Barium sulphate while aluminium chloride will remain dissociated as aluminium and chloride ions. So chloride ions concentration remains unchanged.

BaCl2 > Ba+2 + 2 Cl`

6.6 M of BaCl2 gives 2 X 6.6 M Cl` ions

Cl` ion concentration = 2x 6.6 x initial volume/ final volume of solution

= 2 x 6.6 x 20 /20+20

= 13. 2 M

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