23-24 SolubilityLandscape

# 23-24 SolubilityLandscape - SOLUBILITY Solubility: quantity...

This preview shows pages 1–4. Sign up to view the full content.

CH112 LRSVDS SOLUIBILITY 1 SOLUBILITY Solubility: quantity of a substance that dissolves to form a _______________________ Units of Solubility: g/L Units of Molar solubility: mole/L Some salts are very soluble (> 0.1 M). Recall solubility rules. Some salts are sparingly soluble (< 0.1 M) sometimes referred to as ‘insoluble’. Precipitation and Solubility of ionic salts is an equilibrium in water MA(s) M + (aq) + A - (aq) CH112 LRSVDS SOLUIBILITY 2 SOLUBILITY EQUILIBRIA Precipitation: Dissolution: When the forward rate = backward rate: ______________! AgCl (s) Ag + (aq) + Cl - (aq) The concentration of solid does not change at equilibrium K sp = Solubility Product

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

View Full Document
CH112 LRSVDS SOLUIBILITY 3 AgCl 1.8 x 10 -10 AgBr 5.0 x 10 -13 AgI 8.3 x 10 -17 CdS 8.0 x 10 -27 ZnS 1.1 x 10 -21 Mg(OH) 2 1.8 x 10 -11 Ca(OH) 2 5.5 x 10 -6 CaF 2 3.9 x 10 -11 BaCO 3 5.1 x 10 -9 BaSO 4 1.1 x 10 -10 SOLUBILITY PRODUCTS K sp CH112 LRSVDS SOLUIBILITY 4 SOLUBILITY CALCULATIONS Calculate [Ca 2+ ] and [F - ] for a saturated CaF 2 solution. 1) Write the reaction: CaF 2 (s) Ca +2 (aq) +2F - (aq) 2) Make an ice table 3) Write the equilibrium expression K sp = [Ca 2+ ][F - ] 2 =3.9 x 10 -11 at 25 o C 4) What is the solubility ? solubility = amount of salt dissociated
CH112 LRSVDS SOLUIBILITY 5 Solubility and the COMMON ION EFFECT Add Ag + to solution at equilibrium; solubility _____ Add Cl - to solution at equilibrium; solubility _____ Add AgCl(s) to solution at equilibrium; solubility _____ AgCl (s) Ag + (aq) + Cl - (aq ) Addition of a Common Ion __________________ solubility

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/18/2012 for the course CHEM 112 taught by Professor Vandersluys,lorschmid,kylem during the Fall '07 term at Pennsylvania State University, University Park.

### Page1 / 11

23-24 SolubilityLandscape - SOLUBILITY Solubility: quantity...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online