Class Blog October 31, 2013

What we did in class:

-Went over Double Replacement Reactions and Solubility Lab

-Were scared by a dog and a character from Star Wars

• Correct Way to write a molecular reaction 
•  Fe(NO3)3 (aq) + NaOH (aq) --> NaNO3 (aq) + Fe(OH)3 (s)                            

                                                                           soluble!

3.Sulfate anion Chloride anion Iodide anion   

               -Chloride and Iodine are both Halides

   React with all EXCEPT with silver

4. Carbonate, Hydroxides, Phosphates

Alkali metals tend to be very soluble

5. Soluble because it is a Halide and is expected to act like other halides, which tend to be very soluble.

                       GENERAL RULES OF SOLUBILITY 

Ionic Compounds	Soluble or Insoluble	Exceptions
Carbonates	Insoluble	Alkali cations
Halides	Soluble	Silver
Hydroxides	Insoluble	Alkali cations
Nitrates	Soluble	none
Phosphates	Insoluble	Alkali cations
Sulfates	Soluble	Barium
Alkali Metal Salts	Soluble	none
Ammonium Salts	Soluble	none

HW: #1-5 on Solubility of Common Compounds worksheet (handed out on Monday). Due tomorrow.

        Web-assign due Sunday night 11:59 P.M.

The next scribe is Harish Rajan

Class Blog October 30th, 2013

What we did in class

1. Went over answer key for worksheet ChemThink LabsSim Questions - Precipitates (Look at key in the moodle units 4 key f
2. Mrs. F showed us different examples of equations: 

• We will use molecular and net ionic equation the most in this class
3. Aqueous means it is a solution that contains water
4. We talked about good blogging ideas:  
• Lets step up our game period 4, and beat period 5 in blogging! (Don't worry, it's not like Mrs. Friedmann is comparing us to them or anything..)
• Your name should be labeled "Q2Kate M.". Q2 for quarter two and then your name with last initial.  
• Also, make sure you check the blog every day. The blogger will make sure it is posted by at latest 10pm that night.  Everyone needs to try to comment every night between 10-10:30pm saying something you like, don't like, or something you are confused on. 
5. We performed the Double Replacement Reactions and Solubility Lab  in the last 15min of class. There is no lab write up for this but, there are questions that need to be answered by tomorrow for homework. Read the lab directions and look at results below. NR=no reaction PPT=precipitation reaction.
   
6. Homework for tonight: 
• Complete Post Lab Questions #1-6. Due tomorrow.
• Post lab question #1 changes: "write the name and formula with possibilities for the solid product" 
• Post lab question #2 changes: choose 8 and write the balanced molecular equation ONLY

Next Scribe: Nicole Antony 

Tuesday, October 29th

The Hw last night was the dissociations sheet.  The answers are on Moodle

Mrs. Friedmann gave a demonstration

-Water doesn't conduct electricity

-The ions in water do though,  Only if the break apart and become +s and -s

-Water with sugar does not because the sugar does not break apart 

Notes General Ideas:

-Solutions: Mixture of two or more solutions and they consist of a solute and a solvent 
               Solute is being dissolved

               Solvent is used to dissolve the solute

-The dissolving process of ionic and covalent compounds

-Conductivity Tests

-Weak vs. Strong

Look at power point on solutions on moodle for more information

HW for tonight:

Chem Think- Go to the option two=Labs=Chemical Reactions=Parcipitate lab and fill out ChemThink LabSim questions

Next Blogger: Kate Maki

Monday, October 28

*     We picked up worksheets at the beginning of class, check handouts folder in moodle

*     We went over the test, until 11:25 A.M.

*     Then, we took notes on

         Unit 4 Big Ideas:

         1. Some things mix with water, and some don't
         2. Some of the things that mix with water break apart, and some don't
         3. Breaking apart is called DISSOCIATION
         4. Most of the things that break apart make it so water can conduct electricity 
         5. PRECIPITATION reactions happen because something is made that does not break apart
         6. There are lots of ways to measure and calculate how much stuff is in the water, doing the reacting

*     Remember to check moodle for homework!

Next Blogger:
MARLYE JERVA:)

Class Blog Oct 25, 2013

What we did

- We did our safety cautions again
- Then we resumed from our previous lab the day before
- After seeing the loudness and the softness from the "Pop test", we shooted the small pipet across the room then measured how far it went.

Lab Data:

Marlye, Kate - 25
Grace, Danny, Connor - 20
Brian, Andrew - 15.5
Melissa, Dorothy, Carrie - 25
Gemini, Dana, Nicole - 20.5
Bobby, Conrad - 24.25
Frankie, Harish - 18
Kevin, Brant - 16
Allie, Cait - 24
Elaine, Francine - No Launch

10/21/2013

Today in class we went over homework Worksheet #4, found in the unit handouts on moodle.
Also we turned in the lab, although it's alright to take one more day to correct it and turn it in tomorrow 10/22/13.


The countdown Begins:

 UNTIL MOLE DAY!!!

AND THE...

Check moodle for homework and finish the quiz we started in class today, don't forget to get help from your partners! And don't forget to do your review packet.

Class Blog 10/16/13

Chem Blog 10-16-13

What we did:

--Checked in Homework (Two stoich worksheets + Pre-lab)

--Went over homework (Keys are posted on moodle)

--We were assigned partners, exchanged phone numbers, and were assigned a take-home quiz that we will do with our partners tonight

--Did the Copper and Silver Nitrate lab

Lab Data:

SIlver Nitrate: 1.44g

Copper Wire: 0.73g

Mass of 100 mL beaker: 50.15g

Final Mass: 0.72g

Change of Copper Weight: 0.01g

Homework:

1) You have been assigned a partner to work with to complete Stoich Quiz #2 for homework (posted in the Unit 2 Handouts folder).  If you cannot meet with your partner in person, call them and do the quiz via phone meeting; you should have exchanged phone numbers in class today.  Plan on taking about 15 minutes together.  Follow the directions on the quiz and work as "expert" and "editor".  Due tomorrow.

2) The "Copper and Silver Nitrate" prelab was due in class today.  Check your answers against the key that is posted in the Unit 3 Keys folder.  THEN write 1-2 sentences in your journal that summarize what we are trying to accomplish with this lab.  WHAT ARE WE GOING TO CALCULATE WITH OUR LAB DATA?  Due tomorrow.

3) The "Copper and Solver Nitrate" lab write-up will be due on Monday, October 21.  If you were absent today, get data from the blog post and use that to complete the write-up.

4) Just a heads-up -- our unit 3 test is one week from today, next Wednesday, 10/23.

Next Blogger: Carrie Reusche

Period 4 Chemistry Honors 10/15/2013

Beginning of Class:

- Mrs. Friedmann checked in our homework:

Stoichiometry worksheet #1 and Stoichiometry worksheet #2

- We had four handouts:

1. WS #3 Intro to Limiting Reactants (which is two pages)

2. Copper and Silver Nitrate Lab (which is two pages)

*You can find these handouts on Moodle*

- We went over our homework and asked questions to clarify problems.

When putting down your final answer make sure that you have the right number of significant figures. The significant figures have to equal the number of significant figures in Thing 1 (which is the number given to you in the question).

- After going over the homework, we took a short Stoichiometry quiz!

- When everyone completed their quiz, Mrs. Friedmann introduced us to Limiting Reactants.

*The question we answered on the blog, as a class, was a limiting reactants problem!*

- In almost every reactant problem, one reactant will be all used up - it maintains law of conservation of mass

HOMEWORK!

1. Complete WS #3 Intro to Limiting Reactants (both pages)

2. Read Copper and Silver Nitrate Lab thoroughly, so you are prepared!

3. Answer questions 1, 2, 3 & 4 of the pre-lab.

P.S. Late arrival tomorrow!

Next scribe: Melissa Scherer!!

Class Blog 10/14/13

Class Notes 10/14/13

1. Homework was checked in, which was taking notes on stoichiometry video.

2. Beginning of class was spent briefly reviewing the quizzes we took on Friday

-Remember it’s ok to sometimes fail!

3. 4 Stoichiometry worksheets were passed out. (Examples were done on 2 of them)

4. Next, we took an introduction to Stoichiometry, which is similar  to earlier molar mass conversions done earlier, only these go more in depth.  

-Ms. Friedmann’s in-class notes can be found here on Moodle.

-Stoichiometry is used to compare two “things” (thing 1 and thing 2). Usually, you are given

thing 1 and have to find thing 2

.

-We use mass and mole conversions to help us achieve this.

-Remember the conversion factor:

Mass (grams to molar mass) * Moles (Molar mass to particles) * Avogadro’s Number

Homework:

“1) Complete the Intro to Stoichiometry Wss (worksheets) posted in the Unit 3 Handouts folder.  Due tomorrow.  If you were absent today, take a look at the examples done and refer to the Intro Notes on Stoichiometry (posted in the Unit 3 Notes folder) and see if that's enough to help you get started.

2) Go to the blog and contribute to the class effort to solve the problem I posted there today.  Everyone must make a constructive comment that shows your attempt to process the problem.  The goal is for everyone to understand how to solve this problem by the time we meet in class tomorrow.  WE ARE NOT DONE WHEN THE CORRECT ANSWER IS POSTED; WE ARE DONE WHEN EVERYONE UNDERSTANDS HOW THE CORRECT ANSWER WAS ACHIEVED. “

Next Blogger: Dorothy Wasilewski

Okay, class.  Here is your homework for tonight:  I want you to try to solve the problem below together by discussing it via the comments.  You must comment to get credit!  Problem solving is more fun together than alone.  :)

Suppose I burn 15 grams of butane in 500 grams of oxygen gas.  One of the reactants will be completely used up and one will be left over.

     1)  Which reactant will be used up?
     2)  Which reactant will be left over?
     3)  How many grams of this reactant will be left over?

(Hint:  Write a balance chemical equation first!  Then think it through from there.)

On Friday in class we took the first 20 minutes to go over the lab and Mrs Friedman answered these questions:

Post-Lab Questions:

2. (d) Decomposition: CaCO3 to CO2 + CaO

    (e) Single Replacement: Fe + Pb(NO3)2 to Pb + Fe(NO3)2

Classifying Chemical Reaction Worksheet:

2. Mixing ammonium nitrate and sodium hydroxide solutions gives aqueous sodium nitrate, ammonia gas, and water. 

Answer: NH4NO3 + NaOH to NaNO3 + NH3 + H2O

6. Sulfur dioxide gas reacts with oxygen on a platinum catalyst surface to produce sulfur trioxide gas.

Answer: 2SO2 + O2 to 2SO3

8. Heating solid nickel chloride dihydrate yields solid nickel chloride and water vapor.

Answer: NiCl2 * 2H2O to NiCl2 + 2H2O

9. Heating solid potassium chlorate in the presence of manganese dioxide catalyst produces potassium chloride and oxygen gas. 

Answer: KClO3 to KCl + O2

For the rest of the class we took a quiz on what we have learned in the new unit. 

The next blogger is Frankie Sulejmani

10/10/13 Blog Post

Immediately we checked in the homework, which included the pages “Classifying, Predicting, and Balancing, Oh My!” and “Types of Reactions”. The key containing them both is on Moodle. Also for homework, we had to write down and balance this equation:

copper (II) sulfate reacts with sodium phosphate to produce sodium sulfate and copper (II) phosphate.

The correctly balanced equation is:

3CuSO4+2Na3PO4 ----> 3Na2SO4+Cu3(PO4)2

After looking over the homework, the subject went over to combustion reactions.

• Any reaction that reacts with oxygen and produces heat and flame is a combustion reaction.
• They will always produce carbon dioxide (CO2) and water (H2O).

We received packets from the front of the room, which contains today’s lab. There is no write up for this lab; you only need to finish the packet. This packet can be printed off of Moodle.

This is the data that I received for this lab:

(I was not able to obtain all the data. If you were absent, you can ignore the other 3 reactions.)

           Reactant(s)        Evidence of Reaction             Products

Reaction 1	Magnesium: small metal ovals.	Mg flashes white/yellow when heated with burner.	Mg curled up, turned white and powdery in burned areas.
Reaction 2	Magnesium: small metal ovals. Hydrochloric acid: a clear liquid.	When combined in a test tube, they immediately started to fizz up and produce heat. A popping sound was made when a match was dipped in.	A hot and bubbly liquid.
Reaction 3	Ammonium carbonate: a white, clumped up powder.	When placed in a test tube and held over a match, it became a dusty brown liquid.	A dusty brown liquid.
Reaction 4	Calcium carbonate: little white stones, the size of jelly beans. Hydrochloric acid: a clear liquid.	The CaCO3 became clear when submerged in the acid.	A clear stone submerged in a liquid.
Reaction 6	Sodium phosphate: a clear liquid. Copper (II) chloride: a blue liquid.	When mixed, the liquid stays blue, forms a white precipitate.	A teal liquid with a clump of white goo inside.

The homework is the worksheets inside the packet. Also, there is a quiz tomorrow. The homework and the Predicting Products Practice sheets (which can be found on Moodle) should help in your studying.

The next poster shall be Bobby R.

Class Blog 10/09/13

Class Blog 10/09/13

Beginning of Class

1. Check in homework

• Word Equations
• Balancing Chemical Equations
• Section 3.4 Notes

2. Pick up Handouts

• Six sheets total
  3. Go over homework, answer any questions
  4. Pop Quiz on balancing chemical equations

  Balance MgSO4 + NH4OH → (NH4)2SO4  + Mg(OH)2

  
  

  MgSO4 + 2NH4OH → (NH4)2SO4  + Mg(OH)2

Notes

1. Combination Reaction

• A + B → AB
• Two elements combine to make a compound

2.Decomposition Reaction

• AB → A + B
• A compound breaks up into simple elements

3.Combustion Reaction

• CxHy + O2 → CO2 + H2O
• A compound made of H and C reacts with O2 to make CO2  and H2O

4.Single Replacement Reactions

• A + BC → B + AC
• If the element is a metal it replaces the metal (positive) ion
• If the element is a nonmetal it replaces the nonmetal (negative) ion
• Places only get replaced if the single element is higher up on the Activity Series Chart  than the element in the compound

5.Double Replacement Reactions

• AB + CD → CB + AD
• Activity Series Chart is not used in this
• Two ionic compounds trade positive (front) ions
  
  
  
  
  
  

The next scribe is Dorothy W.