What is the Magnesium Activity in Springs Near Jenner with a pH of 9.5?

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The discussion focuses on calculating the equilibrium concentration of magnesium in springs near Jenner with a pH of 9.5, specifically using the reaction Mg2+ + 2 OH- = Mg(OH)2. Participants are prompted to consider the dissociation constant of water to determine the activities of H+ and OH- ions in the solution. The solubility product for Mg(OH)2 is also relevant for these calculations. There is a mention of forum rules regarding homework help, indicating some participants are concerned about proper forum etiquette. The conversation ultimately aims to clarify the relationship between pH, ion activities, and magnesium solubility in the given context.
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Mg 2+ (aq) +2 OH- (aq)= Mg (OH)2 (s)


If I measure pH of springs near Jenner to be pH=9.5, what can you tell about the equilibrium activity (concentration) of magnesium in that solution? You need to calculate the dissociation constant of water.

Not sure how to start this? Any help
 
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Why do you ignore homework template? In hope nobody will realize? I should delete your post and send you a warning about ignoring forum rules.

What is activity of H+ in the water?

What is activity of OH- in the water?

Now use solubility product for Mg(OH)2.
 
hi,

Sorry, I really thought I put this in the Hw section under the sciences...
 
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