Chemistry dilution question?
What volume of water needs to be added to 25ml of 0·2mol/l calcium chloride solution to produce a solution with a chloride ion concentration of 0·1mol/l?
A 25ml
B 50ml
C 75ml
D 100ml
What volume of water needs to be added to 25ml of 0·2mol/l calcium chloride solution to produce a solution with a chloride ion concentration of 0·1mol/l?
A 25ml
B 50ml
C 75ml
D 100ml
1 Answer
Explanation:
For dilutions, we use the formula:
#V_1,V_2# are the volumes of the two solutions
#c_1,c_2# are the concentrations of the two solutions
Since the original concentration of calcium chloride has a concentration of
Calcium chloride has a chemical formula of
And so, we got:
So, the new solution would have a volume of
Therefore,