A solution of NaOH is added dropwise to a solution that is 0.0802 M in Fe and 2.45e-14 M in Ga. (a) What concentration of OH is necessary to begin precipitation? (Neglect volume changes.) (OH)- (b) Which cation precipitates first? Fel O - Gal M. (c) What is the concentration of OH when the second cation begins to precipitate? [OH- The Kp of Fe(OH), is 4.87e-17. The Kip of Ga(OH), s 7.28e-36.
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![A solution of NaOH is added dropwise to a solution that is 0.0802 Min Fe² and 2.45e-14 M in Gal
(a) What concentration of OH is necessary to begin precipitation? (Neglect volume changes.)
[OH]-
M.
(b) Which cation precipitates first?
O Fe²+
O Ga¹
(c) What is the concentration of OH when the second cation begins to precipitate?
[CH]-
The Kip of Fe(OH); is 4,87e-17.
The Kip of Ga(OH), is 7.28e-16.
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