Chemistry
posted by Elaiza on .
Calculate the concentration of potassium ions in grams per liter after mixing 100 ml of 0.250 M KCl and 200 ml of 0.100 M K2SO4

Given For KCl:
c1 = 0.250M
V2 = 100mL
Given For K2SO4:
c2 = 2*(0.100M) [NB: K{+} conc.]
V2 = 200mL
Assume:
No change in solution density, so final volume equals sum of initial volumes.
Use:
Target concentration is total amount divided by final volume.
c = (c1 V1 + c2 V2)/(V1 + V2) 
30g/l