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farah123
Group Title
Calculate the concentration of potassium ion in grams per liter after mixing 100ml of 0.250M KCl and 200ml of 0.1 M K2SO4
 2 years ago
 2 years ago
farah123 Group Title
Calculate the concentration of potassium ion in grams per liter after mixing 100ml of 0.250M KCl and 200ml of 0.1 M K2SO4
 2 years ago
 2 years ago

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Kryten Group TitleBest ResponseYou've already chosen the best response.1
first you write dissociation of KCl and K2SO4 where you assume that KCl and K2SO4 are completely dissasociated, then you set the ratio for each K+ ion and its compound and from there get the amount of K+ ions from each compound, sum them up and calculate mass, after that divide with summed volume and there you go.
 2 years ago

farah123 Group TitleBest ResponseYou've already chosen the best response.0
What exactly do I sum up?
 2 years ago

Kryten Group TitleBest ResponseYou've already chosen the best response.1
KCl > K+ + Cl K2SO4 > 2K+ + SO4 2 c= n/V > n= c*V n(KCl) = c(KCl) * V(KCl) n1(K+)/n(KCl) = 1/1 = 1 n1(K+) = n(KCl) n(K2SO4) = c(K2SO4) * V(K2SO4) n2(K+)/n(K2SO4) = 2/1 = 2 n2(K+) = 2*n(K2SO4) n(K+) = n1(K+) + n2(K+) n= m/M > m = n*M m(K+) = n(K+) * M(K) V = V(KCl) + V(K2SO4) gama  mass concentration gama = m(K+) / V
 2 years ago

farah123 Group TitleBest ResponseYou've already chosen the best response.0
thank you!
 2 years ago
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