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Monday Lab Info….and Assignment

Interuptions for fire evacuations etc…messed up our day

Assign …study about Dalton’s Law of Partial Pressure by one of the following. 
Problems 52-54…ideal gas law and stoichiometry
   study examples page 194–199   Or watch
   Kahn Academy Partial Pressure Calculations videoLab Report….Finding Molar Mass of a Volitile Liquid.  
     If you were in the class where the chemical used did not produce quality resutults you may substitute the following data so you can have practice with the calculations.  Your lab reaport will be due next week (November 2)

•Mass of vapor 0.586g

•Temp            100.5 oC

•Press           .09973 atm

•Volume        315 mL  

test comments

Be sure to retake test….or make arrangements for retake by Next Thursday October 28

Lab…Molar Mass of a Volitile Liquid

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Assign due Friday  at end of class period 

 Ch  5 # 27-32, 34-36,38, 46—48

click on the comment button  and add comments…..feel free to help each other out…Your instructor will avoid providing too much information BUT YOU can help each other.

There have been several quetions raised about problem 2….
1.  You only have to do PART a ….other parts were not over topics we have studied yet.
2.  All the reactants listed in the problem are listed in the balanced net ionic equation….there is no error.

Week of 10/11

test correction in 1c   Test due Monday 10/18

 

c.       Explain how each of the following would affect the empirical formula that could be calculated
        i.      some unreacted iodine condensed on the strip. 
       ii.      A small amount of white compound flaked off before weighing

If you did not get a copy of the test email me so we can get a copy to you.

Monday…
finish (or close to it) student presentations of problems from chapter 4.

Tuesday
–Start chapter 5 …see Chapter 5 tab above
–Turn in Labs…Purple Haze, Standardization of NaOH.
–Pick up take home test ch 1-4
Wed
–work on test…many students gone taking PSAT test

Standardization of NaOH

Things to look for in your lab report

•Title—purpose of lab

•Materials and Safety —for safety infor access these two MSDS sites
Potassium Acid Phthalate    0.1 M NaOH

•Procedures

•Data Collected over repeated trials (when appropriate)

•Calculations and results (calculated molarities, calculated average molarity for your group

•Error analysis….

–if you titrated past the end point by 0.050 mL of NaOH…how would that change your result?

–If you lost 0.005g KHP in transferring into flask?

Lab Purple Haze

Thursday and Friday zero period lab  

Lab Report Requirements
Title—including the purpose of lab
Materials inlcuding safety for chemicals used
Procedures
Data Collected over repeated trials (when appropriate)
Calculations and results for all trials
Error analysis
          based on the normal oxidation states for copper do you 
          feel confident about your results.

 

Oxidation States and Oxidation Reduction Reactions

Update… this is what we have been doing the past few days

STUDY  Ch 4 Oxidation Reduction Reactions pg 154-
STUDY Ch 4 Oxidation States.. and example problems
STUDY ch 4 Characteristics of Oxidation-Reduction reactions pg 158-
STUDY ch 4 Balancing Oxidtio Reduction Equations pg 162-especially examples

ch 4 # 73…this video is similar to #74  Balancing RedOx reactions by half reaction method
Finish assignment that is outlined below.    

Ch 4 continued

Be sure to refer to the videos below if you are having problems with calculations involving concentration.

Assignments for this week. 
ch 4 # 5,12,21,22,24,27,  due 9/22
ch 4 # 28,29,30,49,50  due 9/23 or 9/24
Ch 4 # 69,70 a-f  Due 9/27

Next Week–work ahead if you get the chance
you know how to do some of these already….some …not so much
Ch 4  , 72, 74, 76, 112, , 57-62   112  107 

AP Chemistry Thursday –Sunday

Assignment

Select ch 4 solutions tabat the top of the page
          Watch the solution chemistry videos and take notes
                   If you do not have internet access come in before and after school to watch the videos in class

 Lecture (Thursday 1st Friday 2nd)

• Read pages 127-135
• take notes on vocabulary
• take notes on Sample exercises 4.1–4.3
• write formulas of all strong acids and strong bases

 

Lab    Net Ionic Equations

for all combinations of compounds that resulted in a reaction write:

1. formula equation
2. complete ionic equaion
3. net ionic equation

Friday Sept 10 More Stoicheometry Solubility Rules

Ch 3 assignment now includes problems 90,79,80,92,94

• check the blog or/and email me if you have questions
• come in for help if you have questions

We practiced using the solubility rules that you put in your notes on Thursday Sept 9 

• page 144
• know how to determine if an ionic compound is water soluble
• form a working knowledge of these rules   (memorize them)

Click this video link for help with problem 79