Class Blog 5/7/14

ONLY 17 DAYS OF SCHOOL LEFT!!!

We checked in the homework (3 worksheet pages)

Mrs. Friedmann didn't finish grading the tests yet.

Today in class...

• Checked in homework
• We learned how to balance redox- equations
• The lesson is recorded and going to be posted by 9 tonight on Moodle. 

Balancing Redox Equations in Acid

• Redox can happen in either acid or base
• Acids have H+ and bases have OH-

In acids Steps:

      1.  Split equation into 2 half-reactions

      2.  Balance each half reaction:     

• Balance all atoms Other than H & O
• Balance oxygen using water
• balance hydrogen using H+
• Balance charges using electrons 

      3.  Multiply each half reaction by an integer so electrons for both half reactions are the same

      4. Cancel and Combine.

***There are 2 examples in the video(in the hw), but its too hard to type it out!!!***

Homework:

1) Forming Ionic compounds worksheet

2) Balancing Redox equations worksheet #1-8

Today in Chemistry when we walked in Mrs. Friedmann checked in our hw from last night.
 We then went over the hw and Mrs. Friedmann answered some questions.  

Next we took some notes on Titration:
 I know the concentration of a base.
What is the concentration of a certain acid?
#H's x Ma x Va = Mb x Vb x #OH's

HCl and NaOH
 # H's= 1        #OH's= 1

 H2SO4 and NaOH
 # H's= 2        #OH's= 1

H3PO4 and Ca(OH)2
 # H's= 1        #OH's= 1

neutralization:
HCl + NaOH ---> NaCl + H2O

We then observed Mrs. Friedmann conduct a brief Titration Lab.

HW:
1) Lab is due tomorrow
2) Start studying for test on Friday!

Tue April 29, 2014

HOMEWORK:

1. Review packet online 
2. Packet pg. 12 and 13
3. Lab write up due Thursday
4. Test on Friday

What you need for the lab write up:

• Typed data (all you group was able to get)
• Calculations for:
• 0.001 M HCl
• 0.001 M NaOH
• 0.001 M HC2H3O2
• 0.001 M NH4OH
• 0.1 M NaCl
• 0.1 M Na3PO4
• Extra credit (Bobby) calculations for:
• 0.1 M NaHSO3
• 0.1 M NaHCO3

My lab data:

Monday, April 28th

Today, we turned in our take home quiz and there were 4 handouts about the labs today.

Then we got in to quick notes for the Lab

Indicators Lab

- An indicator turns one color at one pH is a different color at a different pH.
- Most indicators are weak acids. (HIn - means indicator)
A couple are weak bases

HIn (Color 1 weak acid) <-------> H+ + In- (Color 2 weak base conjugate)

- The indicator responds to changes in the [hydronium ion].

HIn <-----> H+ In-

                   <-------------------- Add base, shift to left (color 1)

Add acid, shifts to the right     ---------------->

These were the basic notes, the more notes for the actual lab are also posted in Moodle... According to Mrs. Friedmann

After some quick notes, we did lab to find the pH of 15 solutions experimentally.

For HW:
Hand in : Table of experimental data
                  Calculations of pH for 15 solutions (It is not Due Tommorow)
                  Webassigns on buffers, due tonight

Next Blogger is Harish R

Friday, April 25

Class Blog for Friday, April 25 :)

A note for: Melissa Frankie EJ and Kate

What we did in class today:
- Mrs. Friedmann put us in small groups and gave us a similar problem to the quiz yesterday. We worked through it and are beginning to understand the concepts of determining the pH of a salt solution. Be ready to perform similar operations to that of the quiz from yesterday, since the quiz didn't count for a grade. This is a learning process:) 
- After that, we went over the quiz. 

Next Blogger: Kevin J
Homework: There is a worksheet, and a webassign on buffers 

Enjoy your weekend!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Class Blog 4-22-14

Hey Honors Chemistry! (Pulling a Mrs. Friedmann) So sorry this is late. I really have no excuse, I just totally forgot.

What We Did

• Checked in homework from last night
• Went over pages 8 and 9 (Our homework from last night)
• Had a lesson on finding the pH of salts.
• The lesson is recorded and should be posted on moodle
• We didn’t get to buffers, so that will be taught on friday

Homework

• 2 webassigns due Wednesday at midnight
• Pages 10 and 11 in the Acids and Bases Packet
• Study for quiz on Thursday.
• We will have VERY short periods on Thursday, so it will be a short quiz.

Who doesn't like a good joke?

1. Girl, you’re a 10.

On the pH scale, because you’re BASIC!

2.

Next Blogger: Allie Boland

OK, so...the video on yesterday's lesson was supposed to be uploaded by 7 pm last night, so on the bright side I'm only 17 hours late.  Sorry!  The link is at the bottom of the Unit 10 box on Moodle.  Tomorrow's quiz will be a problem similar to questions 34 and 35 on pages 10 and 11 of the packet, which the video covers.

Don't forget to enjoy the sunshine!  :)  See you tomorrow.

Ms. F