Conjugate Acids and Conjugate Bases

Friday may 14, 2010

We went over the booklet Acid & Bases pg 3- 12. Then we were given a worsheet to work on the first page - Acids & Bases Project Assignment I, indentify the acid, base, conjugate acid(ca), & conjugate base(cb).
Answers:
1.a) acid + base <---> ca + cb
b) acid + base <---> ca + cb
c) base + acid <---> ca + cb
d) base + acid <---> ca + cb
e) acid + base <---> cb + ca

2. write the equation for the reaction of each of the following with water.Indicate wether the ion or molecule is an acid and base. Which one of these are arrhenius acid/bases and which are Bronsted-Lowry acids/bases?
e.g. HBr + H2O <--->H3O+ + Br- , Bronsted - Lowry & Arrhenius Acid
Answers:
2. a) <--->C3H3O2- + H3O+ Arrhenius Acid & Bronsted - Lowry
b) <--->HS- + OH- Bronsted - Lowry Base
c) <--->HSe+ + OH- Bronsted - Lowry Base
d) <---> H2CO3 + OH- Arrhenius Acid & Bronsted - Lowry

Homework for this weekend:
- finish the Next page of the woorksheet Acids & Bases Woorksheet 2 Question 1 & 2, hand in for monday.
- also the foldables (Arrhenius, Bronsted - Lowry , Lewis) follow the rubric for foldables to get a perfect mark this is also hand in for monday.

& the next scribe will be: julien:)

Redox

Today, Ms. K went over the Rules for Determining Oxidation Numbers, we also went over the homework that was assigned for us on Friday. The worksheet question 1-4: Assigning Oxidation Numbers -- Practice.


Oxidation - involves an increase in oxidation
Reduction - involves a decrease in oxidation #

We also learn, how to indicate whether or not the reaction is a Redox reaction

Example of Reduction:

0 +1+5 -2--------> 0 +2 +5 -2

Cu + AgNO3------->Ag + Cu(NO3)

- Ag gain 1 electrons (Reduction)

- Cu loss of 2 electrons (Oxidation)

& we were asked to work on our yellow Booklet on page 21 question #2-17, for tomorrow.
- the next scribe will be JulieAnneNavea:)