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Calculate the concentration of potassium ion in grams per liter after mixing 100ml of 0.250M KCl and 200ml of 0.1 M K2SO4
 one year ago
 one year ago
Calculate the concentration of potassium ion in grams per liter after mixing 100ml of 0.250M KCl and 200ml of 0.1 M K2SO4
 one year ago
 one year ago

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KrytenBest 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.
 one year ago

farah123Best ResponseYou've already chosen the best response.0
What exactly do I sum up?
 one year ago

KrytenBest 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
 one year ago
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