Q2: Week 7 – 1/3 – 1/7
1/3 – Monday – A Day – A Day – 2/3a Lab, 4
Main focus –
a) To introduce the concept of Stoichiometry through gases.
b) To learn of the story of Torricelli and the birth of the manometer.
c) To measure pressure with a manometer
1.Review the Volumetric Titration Test –
2. Connections of our last learned concepts to our new concept of gas laws.
3. Manometer introduction – The first measurement of pressure.
1. Same as above except the review of the last test will be tomorrow.
Gas Law Segway:
In lab 16, we dissolved the brass shot with nitric acid. The balanced reaction that you needed for the lab is given below:
You can see that the product of the reduction of the nitrate ion (NO3- ) is NO2 which is released as a brown gas. Let’s take a look at the time lapse of this reaction.
Lab 16 oxidation of Cu and Zinc in brass:
YES!!! We can use the volumes measured through gas generating reactions to…
1. determine the limiting reagent 2. Determine the amount of the reagents ( amount of active ingredients, % by mass ) 3. Determine the empirical formula? (mole ratios of atoms. 4. identify the compound (molecular mass. 5. Determine the Amperage needed to power this non-spontaneous reaction?
In how many reactions that we witnessed or discussed in class up to this point did we generate a gas? Did we generate a gas in electrolytic cells? Did we split water using an electrolytic cell?
I did this demo in class.
Gas Law Pressure Intro Presentation:
- Start at
1/3 – Monday Homework: –
End Of Monday!!!
1/4 – Tuesday – B Day – 2, 3b/4 Lab
a) To identify the units of pressure and their equivalents
b) To derive the ideal gas law equation and the combined gas law equation.
c) To introduce the Universal Gas Constant.
3. Same as 1 – 3 above for Period 2.
Gas Law Derivation prenetation animations:
1/4 – Tuesday Homework: –
End Of Monday!!!
End Of Monday!!!
1/5 – Wednesday – A Day – A Day – 2/3a Lab, 4
a) To have guided practice with the Ideal Gas Law Equation and Combined Gas Law
b) To identify Gas Law problems in other “Units”.
c) To identify the individual relationships between gas variables.
1. Review the last nights Homework –
a) identify the formula used – Last night’s Homework review – When to use Dynamic or Static
2. Review of variable relationships from derivation – (draw graphs for period 2 in derivation)
– relationship only works when other variables are held constant
New pressure – unit Kilo pascals – from pressure intro presentation
1. Same as above but will not draw graphs for derivation.
1/5 – Wednesday Homework: –
1. Please complete following worksheet and review with the key.
1/6 – Thursday – A Day – B Day – 2, 3b/4 Lab
a) To Derive the standard unit of Pressure = Pascals
b) To Derive the density and Molecular mass of a gas
1. New pressure – unit Kilo pascals – derivation from pressure intro presentation
2. Boyles Law demo with Marshmallows/ Final relationship with 1st derivation – (make graph)
a) Boyles Law destroyed with liquid nitrogen – gauge pressure – Bourdon pressure gauge = manometer! , Cracking knuckles
3. New Derivation of Density and Molecular Mass of a Gas
1. Same as above except will add, tornado tubes, water cardboard, large Flask, egg demos.
1/6 – Thursday Homework: –
2. Please study the Ideal Gas Law Derivation and the Molecular mass/Density Derivation for tomorrow’s Quiz. I have posted both derivation video below for your review.
1/7 – Friday – A Snow ( water depositioning ) Day !
a) To Enjoy the day off!! There is no quiz today! The pressure is off (as if it was 0K!)
1/7 – Weekend Homework: –
1. Please make sure you have completed all gas law worksheets that have been assigned. I will collect or check them Monday.
2. Please Study for the derivation quiz Monday using the posted videos in Thursday’s post above.
3. Please complete the following worksheet that is based on the newly derived Molecular Mass and Density equations and review with the key below:
Gas Law worksheet 5 – density, MM, Stoich.pdf
Gas Law worksheet 5 – density, MM, Stoich KEY.pdf
End of week 7!