In: Chemistry
2KCl(aq) + Ag2SO4(aq)----> 2AgCl(s) + 2KNO3(aq)
2
mole
2 mole
no of moles of KCl = Molarity * volume in ml
= 0.5 * 0.025
= 0.0125 moles of KCl
from balanced equation
2 mole of KCl react with Ag2So4 to from 2 mole of AgCl
0.0125 mole of KCl react with AgNO3 to from 0.0125 moles of
AgCl
mass of AgCl = no of moles of AgCl * molar mass of AgCl
= 0.0125*143.4 = 1.793 gm of AgCl
KCl
molarity M1 = 0.5 M
volume V1 = 25ml
no of mole n1 = 2
Ag2SO4
molarity M2 =
volume V2 = 45ml
no of moles n2 = 1
M1V1/n1 = M2V2/n2
M2 =
M1V1n2/n1V2
= 0.5*25*1/2*45
= 0.138M
concentration of KCl left = 0.5-0.138 = 0.368 M