Given: A magnesium hydroxide solution is prepared by adding 12.00 g of magnesium hydroxide to a volumetric flask and bringing the final volume to 1.15 L by adding water buffered at a pH of 7.0.
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![Given: A magnesium hydroxide solution is
prepared by adding 12.00 g of magnesium
hydroxide to a volumetric flask and bringing
the final volume to 1.15 L by adding water
buffered at a pH of 7.0.
Required:
A. [Molar] concentration of magnesium in
this solution. Use pksp = 11.25 to find Ksp
B. Repeat Part A, except, use a solution pH
of 12. You do not need to repeat the parts
of the problem that are not affected by the
change in pH.
C. Compare the two results and the
conditions that produced them. Based on
this comparison describe a water treatment
approach that could be used to remove
Mg2+ from water.
Assumption: The temperature is
Simplification: Neglect ionic
25°C.
strength.
Hint: Relationship between [H*] and [OH"]:
H20 <--> H* + OH"; [H*][OH¯] = Kw = 10
14 M2 (25°C)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4a1928e1-5345-4b4b-a613-69e846b8b375%2F516c2719-655c-4256-b864-cc35bb27a847%2F45z482n_processed.jpeg&w=3840&q=75)
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