In class notes for December 12, 2007

In class notes for December 12, 2007 - F-+ H 2 O HF + F- If...

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General Chemistry Lecture 102a In class notes for December 12, 2007 Do Chapter 9 OWL tonight! Last lecture o Separation of ions o Solubility of hydroxide Ph dependence Today o pH dependence of non-hydroxide insoluble compounds o Complex ions o LAST DAY IF CLASS!!!!!!!!!!! He will not be here on Friday. Review session: Tuesday 4-6pm SC 4309 Mg(OH)(s) Mg 2+ (aq) + 2OH - (aq) S=1.4 x 10 -4 Solubility in pH=8.0 buffer? The s value is [OH - ] concentration = 2.8x10 -4 . pH=10.4 So magnesium hydroxide is more soluble in pH 8 than it is in pure water. The pH dependence is the common ion affect. What about CaF 2 Ca 2+ + 2F - ? Solubility is pH dependent. F - is a weak base, if you put it in water you have base hydrolysis occuring.
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Unformatted text preview: F-+ H 2 O HF + F- If you have a basic solution, not much HF forms. The solubility is normal. If you have an acidic solution, F-+ H 3 O + HF + H 2 O Removes F-from equil more soluble than predicted. General Chemistry Lecture 102a In class notes for December 12, 2007 Anions that do not hydrolyze (Cl-, Br-, I-, SO 4 2-to some extent) have not pH dependent solubility. Anions that do hydrolyze have a pH dependent solubility. F-, CO 3 2-, etc. AgCl does not have a pH dependence of solubility. Demostrations...
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This note was uploaded on 02/22/2009 for the course CHEM 102a taught by Professor Hanusa during the Fall '06 term at Vanderbilt.

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In class notes for December 12, 2007 - F-+ H 2 O HF + F- If...

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