Exam 3 Review

Exam 3 Review - between K sp and s takes a different form...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 1128Q Exam 3 Review Chapter 16 Precipitate forms when cation from one solution combines with anion from another solution to form an insoluble ionic solid. Solubility Product Constant K sp =[A + ][B - ]; solids do not appear in expression K sp can be used to determine if a ppt will form by determining the direction of the system. Q has same mathematical form as K sp but it is at a particular moment. o Q > K sp Precipitate Forms More ions than can hold o Q < K sp No Precipitate Forms Less ions than required for ppt o Q = K sp Precipitation Point Saturated with ions When an ionic solid consists of anions and cations of different charges, the relation
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: between K sp and s takes a different form, but the principle remains the same. • Common Ion Effect - if there is a preexisting concentration of one of the ions of a compound in solution, the solubility of the compound in that solution decreases. Chapter 17 • ΔH – enthalpy change o NegativeΔH tends to make reaction spontaneous • ΔS – entropy change o Positive ΔS tends to make reaction spontaneous • ΔG – free energy change o Negative ΔG guarantees a spontaneous reaction •...
View Full Document

This note was uploaded on 11/16/2011 for the course CHEM 127 taught by Professor Wicholm during the Spring '08 term at UConn.

Ask a homework question - tutors are online