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For doing Ksp problems, how come some problems require the stoichiometric coefficent to be in front of the variable in question as well as an exponent, where as some only require the coefficient as an exponent. what sets these two types apart? Here is the two different types. Ksp of La(OH)3= 2x10^-21Fe+3precipitates from acidic solution by addition of OH-1 to form Fe(OH)3. At what pH will solid Fe(OH)3begin to form? (Ksp=2

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The answer is given in the attachment.Answer Fe loH) est t30 4 3S S Salubiity Felota [Pe0H3 ()(303 27 s 11 27 s4 2 o Xo-39 M) 9.2 lo - gсон3 - Log (3 9.2 10-1) pouat 25c So at La loH) LA4 430 - (o.010) o 2 x 1o-2 210-21 2 X 10-19 5.8 x10- Г (s* 109) 8.2 4-6.2 for Pacibitation of LAOH agw

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