shemiahking5432
31.07.2019 •
Chemistry
The solubility of cd(oh)2 can be increased through formation of the complex ion cdbr2−4 (kf=5×103). if solid cd(oh)2 is added to a nabr solution, what would the initial concentration of nabr need to be in order to increase the molar solubility of cd(oh)2 to 1.0×10−3 moles per liter?
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Ответ:
Concentration of sodium bromide required = 2.38 M (around 2.4 M)
Explanation:
The equilibrium representing the complex ion formation is:
-----(1)
where K(f) = formation equilibrium
The equilibrium representing the dissolution of Ca(OH)2 is:
---(2)
where Ksp = solubility product
adding Equation (1) and equation(2) gives the net reaction:
Ответ:
5) What is the net charge of every ionic compound? In every ionic compound, the total positive charge of the cations must always equal the total negative charge of the anions, so that the net charge of the complex is always zero
about question number 4 not having any idea