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

Hi, class!  Given that we have not yet discussed buffers in detail in class yet, I have elected to move the deadline for the Buffers WebAssign to SUNDAY NIGHT, 11:59 pm.  The other WebAssign (on Kb and salts) is still due tomorrow night (Wednesday 4/23) by 11:59 pm.  By Thursday you should also have completed pages 10 and 11 in the packet...for those of you absent today a video of today's lesson will be posted by 7 pm tonight.  Quiz Thursday, during our 20 minute period (it will be a problem calculating the pH of a salt).

Happy ICEing!

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

April 17, 2014

Hey y'all!

What we did in class is that first, we did the quiz.
Whoever didn't take the quiz, make sure to make up the quiz when you can!

Next, we went over some problems in the Acids and Bases packet.

NEED TO KNOW FOR SOME OF THE QUESTIONS:
pH= -log[H+]
pOH= -log [OH-]
pH+pOH=14
[H+]=10^-pH
[OH-]= 10^-pH

Homework: page 6 and 7 in the Acids and Bases packet.

Good luck y'all and have a great weekend!!!!!!

The next blogger will be Connor Hartigan.

4-16-14

4-16-14

Today, we started class by going over the quiz.

Heads up! There will be a quiz on an ICE problem tomorrow. Be ready for anything, I suggest. There is also a web assign due tonight as per norm.

After that, we went over the homework.

Two important notes:

-In these ICE problems, the concentrations of H3O+ and OH- are very important!
-Small zero rule is always a good choice! (btw. In the small zero rule, you take out the x that is either being added or subtracted)

We went over 9a and 10a.
9a. Concentration of H3O+ should be .000035
10a. Concentration of OH- should be .003

Mrs. Friedmann will post up the key on Moodle.

On that note.
GOOD JOB HONORS ENGLISH STUDENTS! WE MADE IT!

Next blogger will be Elaine Sine.

4/15/14

4/15/14

Conrad Mordzinski

1. Check in the homework. (First three pages of the packet)

2. Review the answers to the homework, if you were absent go on moodle and check the answers yourself. 

3. Homework is: 2 webassigns due tonight at 11:59pm, 1 webassign due tomorrow, wednsday at 11:59pm, and #9 and #10 from the Acids/Bases packet.

 

TOMORROW'S BLOGGER IS............ Connor Hartigan

Daniel Schiller 4/14/14

4/14/14

Blog Post by Daniel Schiller

We started off class by talking about the homework.

Homework:

• Webassigns due tuesday Night.

• Pages 1, 2, and 3 of the packet given to us in class on Acids and Bases due tomorrow.

• Lab due Tomorrow!!!
• Lab data can be found on the last blog post!!!

Next, we took notes on Acids and Bases:

The next blogger will be Conrad Mordsinski 

Class Blog 4/11/14

Hw:

1. Lab Write-Up ---> Due Tuesday
             - Title
             - Purpose
             - Data
             - Post Lab questions
          (Please write question out!)
             - Conclusion
                        Instead of Claim, Evidence, Reasoning, summarize properties of acids & bases
             Ex.)
                        Acids             l             Bases
                        -                      l            -



2. 2 Web Assigns ----> Due Tuesday night


After discussing Homework, we finished our Lab

Data

	Conductivity	Litmus Paper	pH paper	PhT	Universal	Mg Ribbon	Calcium Chloride
HCl	bright red	red	plain	white	red	reaction	no reaction
HC2H3O2	bright red	orange	plain	clear	red	reaction	no reaction
DI Water	none	bluish green	plain	pink	blue green	no reaction	no reaction
NH4O	dim red	black	blue	pink	purple	no reaction	no reaction
NaOH	both	navy blue	blue	pink	navy	no reaction	no reaction

A1 - 24 drops

A2 - 29 drops

A3 - 40 drops

A4 - 31 drops
_________________________


Next Blogger will be...

no idea... :O

Have a great weekend WEEEEEEEEEEEEEEEEEEEEEEEEEEEE~

4/10/14

Hello fellow chemists,

Today we were assessed on our knowledge regarding Lechatlier's principle, and Ksp problems. The quiz took about 25 minutes to complete, and after the assessment we began a lab. The data will be posted tomorrow.

Thank you, and stay classy,

EJ Reynolds




The next blogger will be announced tomorrow during class.

The link to the video going over stuff for tomorrow's quiz on Le Chatelier and Ksp is now posted, check it out, especially if you were absent today (I'm talking to you, field trippers!)  It's at the bottom of the Unit 9 box on Moodle, for your viewing pleasure.  Popcorn optional.  :)

4/09/2014

CLASS BLOG:

We were given two handouts: ACID/BASE PROPERTIES LAB

We were going over two example problems

- Video on this is going to be posted (5:00 pm or later) to help you prepare for the QUIZ TOMORROW!

Notes (just in case the video fails):

• LeChatelier's Principle
• Ksp
• Calculate [  ] at equilibrium
• Calculate Ksp (using solubility) 
• Calculate S (solubility) 
• have to be given Ksp
• Need number of ions and memorize algorithms
• Ksp - Common Ion Problems

• Solubility and Ksp Problems
• Ex 1: Which of the following has the lowest solubility?
• a.) AgC2H3O2  Ksp= = 1.9 x 10 ^-3
• b.) AgCl  Ksp = 1.8 x 10 ^ -10
• c.) BaCrO4  Ksp = 1.2 x 10^ -10 (Ksp smaller, so lowest solubility)

2 ions : AgC2H3O2 (s) -------> Ag+ (aq) + C2H3O2 - (aq)

....so on for the next two dissociations...

all have two ions! 

• Ex 2: Which of the following has the lowest solubility?
• a.) MgCO3  Ksp = 6.8 x 10 ^-6
• b.) PbCl2  Ksp = 1.7 x 10^-5
• c.) Al(OH)3  Ksp = 2.0 x 10^-31 (SMALLEST Ksp)

write out the dissociations.... 

1st (a.) one has two ions, so take the square root of Ksp.

2nd (b.) one has 3 ions! Take the cube root of that Ksp/4.

3rd (c.) one has 4 ions! Take fourth root of Ksp/27.

• Common Ion Problem
• What is the solubility of PbCl2 in 0.100M MgCl2? The Ksp of PbCl2 = 1.7 x 10^-5
• Dissociation equation: MgCl2 ----> Mg 2+ (aq) + 2Cl- (aq)
• MgCl2 = 0.100M. and Mg= 0.100M.  and Cl= 0.200M.
• PbCl2 <-----> Pb2+ (aq) + 2 Cl- (aq)
•              I         0                   0.2
•              C       +x                  +2x
•              E        (x)             (0.200+2x)
• Use ice for PbCl2
• 1.7x10^-5 = (x)(0.200+2x)^2 , Get rid of the small x; (2x)
• 1.7x10^-5 = (x)(0.200)^2  
• 1.7x10^-5 = 0.04x
• x = solubility = 4.25 x 10^-4

HOMEWORK: STUDY!

NEXT BLOGGER WILL BE: EJ REYNOLDS

Class blog 4/8/2014

Today we got a sheet about the 2014 GBS science contest. If you are interested in this I would talk to Mrs. Friedmann.  

QUIZ ON THURSDAY!

The quiz will be covering:

• Le Chatelier's Principle
• Ksp
• Ksp - common ion problems

We went over the solubility product constant packet as well.

-------------------------------------------------------------

We then learned how to do common ion problems:

Solubility in water vs. solubility in another solution. 

--------------------------------------------

ex: BaSO4 <==> Ba (aq) + SO4 (aq)

                            0 M         0.10 M

                            +x            +x 

                            (x)            (0.10 + x)

Ksp BaSO4 = 1.1 * 10^-10

What is its solubnility in 0.10 M Na2SO4 solution?

Na2SO4 ==> 2Na   + SO4

0.10 M           0.20M   0.10M

1.1*10^-10 = (x)*(0.10+x)

1.1*10^-10 = 0.10x + x^2

1.1*10^-10 = x(0.10x)                                (small x rule)

x = 1.1 * 10^-9

NEXT BLOGGER: DOROTHY WASILEWSKI

Class Blog 4-7-14

Today we got back the LeChatelier's Principle Quiz back.

We did the Solubility Product of Silver Sulfate Lab today.
We did not know this was going to happen so no prep work was due today. Don't worry.

Trial One:
Initial: 17.20 mL
Final: 20.00 mL

Trial Two:
Initial: 14.30 mL
Final: 17.50 mL

Tomorrow we will be reviewing our data. There are no post lab questions.

Quiz on LeChatelier's and ICE Problems on Wednesday

Homework:
NONE!!!!!!!!!!

Tomorrow's blogger will be Harish Rajan! 

April 3 2014 Blog Post

TODAY'S BLOG: 4/3/14

What we did in class today: 

• We checked in homework (Post lab questions, pre-lab, ice problems wkshs, video notes). 
• All HW Can be turned in tomorrow for credit due to this week being crazy!!
• We got our tests back (they were eh....) Don't worry if you don't get ice problems totally yet, we will continue to be working with them. 
• For the MAIN part of class we discussed how Mrs. Friedman should grade parts of our test! Mrs. Friedman agrees, and is considering grading them differently. (Discussion was started by Bobby)
• We did part of the hw in class

Also: Today, we practiced the lock down and tornado drill, so classes were shortened. 

Today's homework:  Do the first page of the packet named THE SOLUBILITY PRODUCT CONSTANT! GET SOME SLEEP TODAY!!!! :) 

HERE'S SOME INFORMATION!

NOW FOR SOME CHEM JOKES!!!!!