in a solution containing potassium nitrate and potassium sulphate, the concentrations of potassium ions and nitrate ions are 0.5M and 0.2M respectively. What is the concentration of sulphate ions?
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一條CHEM 問題...
2009-04-05 6:37 am
回答 (1)
2009-04-05 7:45 am
✔ 最佳答案
Assume the solution contains x M KNO3 and y M K2SO4.
x M KNO3 gives x M K+ ions and x M NO3- ions.
y M K2SO4 gives 2y M K+ ions and y M SO42-(aq) ions.
Concentration of NO3- ions: x = 0.2
Concentration of K+ ions: x + 2y = 0.5
0.2 + 2y = 0.5
0.2y = 0.3
y = 0.15
Concentration of SO42- ions
= y M
= 0.15 M
=
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