To solve this task, we have to use this molar formula : Number of Moles=Mass/Molar Mass.
According to this, we can calculate each : \(KCl=3.40/39+35.5\) which is 0,045 moles.
Then use this formula to go on :
№of moles=Concentration(mol/dm3)∗Volume(dm3), and then \(CaCl2=75*0.210/1000\), which is 0.01575Moles.
Then you can calculate concentration :\(K+=0.045
Cl-=0.045\)
\(Ca+2=0.01575
Cl-=0.01575*2\)
Total number : \(Cl-=(0.01575*2)+0.045\)
Here are moles of K+ 0.045/0.075
Of Cl- (0.01575*2)+0.045/0.075
Ca2+ 0.01575/0.075
And the needed answer is definitely : =0.06075
