In class notes for December 5, 2007

In class notes for - NaCl(s ⇌ Na(aq Cl(aq o Unsaturated solution Concentration below max solubility o Supersaturated solution Concentration is

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
General Chemistry Lecture 102a In class notes for December 5, 2007 Ch 8 OWL due Friday at 11:59 pm Ch 9 OWL due a week from Thursday at 11:59 pm Try suggested Oxtoby problems on polyprotic acids (see OAK) Check OAK for information about a review during finals week = [ ][ ] KaIN H3O In HIn [In] is color 2 and [Hin] is color 1 Clicker Quiz o An aqueous acetic acid solution and an aqueous perchoric acid solutions are found to have the same pH at 25 C. If equal volumes of each are used to neutralize a KOH solution, which of the statements will be true? The acetic acid will neutralize a larger volume of the KOH solution. SEE A o Consider a buffer composed of aquesous NH4Cl and NH3. At 25 C, Ka for NH4+ = 5.6x10 -10 . The NH4+/NH3 buffer system could be used to prepare an effective buffer at a pH equal to: 9.25 Chapter 9- Solubility Equilibrium o Saturated solution Concentratioins correspond to max solubility and soluid present NaCl → . 36g100mL 62mol100mL 6 2 M There must be an equilibrium between the solid and the aqueous ions
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: NaCl(s) ⇌ Na + (aq) + Cl-(aq) o Unsaturated solution Concentration below max solubility o Supersaturated solution Concentration is greater than max solubility. No solid present. o We will always write these starting with solid as the reactant. Ex. • Mg(OH) 2 (s) ⇌ Mg 2+ (aq) + 2OH-(aq) K sp (solubility product) • K sp =[Mg 2+ ][OH-] 2 General Chemistry Lecture 102a In class notes for December 5, 2007 • Think about the solubility • Mg(OH) 2 (s) ⇌ Mg 2+ (aq) + 2OH-(aq) • Our solubility is defined based on the number of the reactant that is dissolved • Used a ICE table • So at equilibrium we get K sp =[s][2s] 2 = 4s 3 • Ksp is not equal to the solubility • Mg(OH) 2 is not in the equilibrium constant because it is a solid • Ksp solubility and vice versa o ONLY WORKS FOR INSOLUBLE SALTS o Because of ion pairing and non ideal behavior of solution • •...
View Full Document

This note was uploaded on 02/22/2009 for the course CHEM 102a taught by Professor Hanusa during the Fall '06 term at Vanderbilt.

Page1 / 2

In class notes for - NaCl(s ⇌ Na(aq Cl(aq o Unsaturated solution Concentration below max solubility o Supersaturated solution Concentration is

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online