Aluminum hydroxide, Al(OH)_3, K_sp = 3.7e-32, is insoluble. Determine the molar

Question

Aluminum hydroxide, Al(OH)_3, K_sp = 3.7e-32, is insoluble. Determine the molar solubility of aluminum hydroxide in neutral rain. Trlethylamine, (C_2H_5)_3N, Is a weak base related to ammonia. K_b = 1.02 Times 10^-3. What is the pH of a 0.04 M solution of triethylamine? The K_sp for cerium iodate, Ce(IO_3)_3 is 3.2 e^-10. What is the molar solubility of Ce ion in pure water? A 0.092 M sodium iodate is added as a common ion. What Is the concentration of Ce ion with the common ion present? What is the ratio of the Ce ion with the common ion added to the Ce ion in pure water? What is the effect of a common ion being added to an established equilibrium?

Explanation / Answer

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4.
For neutral , [OH-]= 10^-7 M

Al(OH)3   <------> Al3+   +   3OH-
                                      S             10^-7

USE:
Ksp = [Al3+] [OH-]^3
3.7*10^-32 = S* (10^-7)^3
S= 3.7*10^-11 M

Answser: 3.7*10^-11 M

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