Question

Find the concentration of [KI], [NH4)2S2O8], and [Na2S2O3] with the given information.

Flask A contains
1) 7.50mL of 0.200M KI
2) 2.50mL of 0.200M KCl
3) 5.00mL 0.0050 M (S2O3)2-

Flask B contains
1) 5.00mL of 0.100M (S2O8)2-

The total volume for the reaction is 20mL as Flask A and B are mixed together.

Answer 1

So I started the problem by converting mL to L and then by multiplying each to the given concentrations [M] and I got

Flask A
1) 0.0015mol of KI
2) 0.0005 mol of KCl
3) 0.000025 mol of (S2O3)2-

Flask B 1) 0.0005 mol of (S2O8)2-

Do I divide each answer that I got by 0.020L?