Blog 4-21-14

Welcome back, I hope everyone had a great 3 day weekend.

-We started today by checking in pages 6-7 in the packet.

-We then grabbed a packet of pages 9-11 that should be stapled to the current packet.  (moodle here -->Part 2)

Reminders

-Nothing in this unit is new, it is review just in the form of acids and bases

Review

pH= -log[H+]
pOH= -log [OH-]
pH+pOH=14
[H+]=10^-pH
[OH-]= 10^-pH

pH<7 = Acidic

pH=7 = Neutral

pH>7 = Basic

Strong Acids: HCl, HBr, HI, HNO3, H2SO4, HClO4

Strong Bases: NaOH, LiOH, KOH, Ca(OH)2, Sr(OH)2, Ba(OH)2

Notes

-Percent Dissociation

     -What percent of the original chemical undergoes dissociation?

     -Change (or X found in equation) divided by the original concentration.

-Conjugate Bases and Acids (VERY IMPORTANT)

     • The conjugate base of a weak acid tends to form basic solutions in water. 

     • The conjugate acid of a weak base tends to form acidic solutions in water. 

     • The conjugate base of a strong acid has neither acidic or basic properties. 

     • The conjugate acid of a strong base has neither acidic or basic properties.  

Homework

-Finish Pages 8-9 of the packet

-Try #34 on page 9 for possible extra credit

-2 webassigns due wednesday night

next blogger is... Melissa