2/25/2013 Standard: 4 (Gases and their Properties)OBJECTIVES:  ● Complete "Discovering direct & inverse in PV = nRT - Mini-Lab"  ● Students will understand the specific units of measure in PV = nRTDO NOW: 1. Read lab (today's handout) silently to yourself.HOMEWORK: 1. Ch 14.3 PP's p. 437 41-45 (5 pts) Std 4 =========================================================== BASKET (Stamped): Journal 2/22 (Dalton's Law Lab) 1. SN Ch 14.2 p. 190, Ch 14.3 p. 193-195 (3 pts) Std 4 2. Appendix A p. 879 8 & 9 (2 pts) Std 4

Discovering direct vs inverse in PV = nRT - Mini-Lab http://mrwiggersci.com/chem/Labs/Lab-Gas-Sim-PVnT-relations-direct-or-inverse.pdf

PV = nRT ----- Ideal Gas Law

P - atmV - Ln - mol (never g)R = 0.0821 (don't bother w unit) T - always K

PVnT

Always use the following units when calculating anything with PV = nRT

see p. 435 for units used for R, which require you use differentunits from what you see above

2/26/2013 Standards: 4 (Gases and their Properties)OBJECTIVES:  ● Students will be able to predict how ideal (accurate) an Ideal Gas Law

calculation will be based on the conditions.  ● Students will be able to use STP in gas law calculationsDO NOW: 1. p. 437 41-45HOMEWORK: 1. Ch 14.2 PP's p. 432-433 24 - 33 (5 pts) Std 4 =========================================================== BASKET (turned in): Journal 2/25 1. Ch 14.3 PP's p. 437 41-45 (5 pts) Std 4

Students having problems solving for an unknown, this is helpful.Have students solve for unknows in abcde letters, then use PV=nRTto apply it.

PV = nRT

IDEAL GAS LAW

What conditions make it most accurate?

high temperature

low pressure

Not 100% accurate? Why? Intermolecular forces exist!!!!!!

Do intro to this by showing tennis ball and golf balls, tell them they won't believe youbut they actually attract each other. Moleculesdo the same thing, both by gravity and if theyare polar, by magnetism. Show magnets, fast motionand slow motion to demo temp high makes faster motion and pressure low allows more separationreducing attractive forces between molecules ofgas.

STP

Temp - 0°C = 273KPressure - 1 atm

Magic of STP

22.4 L of any gas = 1 mol

@ STP

a. 3.00 mol O2 at STP has what volume?

b. 8.00 L Ar at STP has how many moles?

Guided Practice

p. 432 PP's 24 - 28

Show givens, find, and gas law you will use to solve.

Work in groups of 4. Ex Cr for each group called on if the person called from the group can give and understand the problem called

on.

Extra Credit/sentences

2/27/2013 Standards: 4 (Gases and their Properties)OBJECTIVES:  ● Demo Charles' Law (plastic bottles & simulator), and Boyle's Law

(sim. only) as reviewDO NOW: 1. Review last night's HW & be sure you got it right!HOMEWORK: 1. Ch 14.4 PP's p. 441 56-59; p. 443 60 (5 pts) Std 4=========================================================== BASKET (turned in): Journal 2/26 1. Ch 14.2 PP's p. 432-433 24 - 33 (5 pts) Std 4

To Journalize is

to

Realize

what you actually learned

ANNOUNCEMENT

If you have missed any of the labs for Ch 14 (see website) because you were absent or just didn't turn them in, you are still responsible to make these up. There are three counting the Boyle's Law lab you will be turn in next Monday.

All labs must be made-up by Friday of next week

Boyle's Law Lab & simulator http://mrwiggersci.com/chem/Labs/lab_Boyle_Law-use-gas-sim.htm

Go to computers and see if you can make the simulator work. This will be due on Monday 3/4/13.

Go to Learning Center > Labs > Ch 14 > Boyle's Law Lab

Try 2 different volumes and see what the pressures are.

DEMONSTRATION OF SIM FIRST - then:

This lab will be due on Monday 3/4/13

Charles Law - demonstration and simulator - demo sim and bottles in & out of hot water

http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/gaslaw/charles_law.html

Balanced chemical equations give you 2 ratios!

1. mol (as before)

2. volume

Volume and mole relationship is DIRECT because: 1 mol of any gas is will occupy

22.4 L of volume at STP

This also means: as long as the gases you are comparing are under the SAME conditions, this

relationship exists.

So, this applies to all problems on p. 441 and p. 443

2/28/2013 Standards: 4 (Gases and their Properties)OBJECTIVES:  ● Students will be able to solve stochiometry problems of volume - mass  ● Students will be able to do concept maps for g A ---> L BDO NOW: 1. Balance this equation.

__KClO3 ----> __O2 + __KCl 2. Draw a concept map to figure out how many liters of O2 can be created

form 29g KClO3 at STP. 3. Show given, find, and then solve the problem.

HOMEWORK: 1. Ch 14.4 PP's p. 443 61 - 64 and Assess 65 - 67 (5 pts) Std 4

=========================================================== BASKET (turned in): Journal 2/27 1. Ch 14.4 PP's p. 441 56-59; p. 443 60 (5 pts) Std 4

Be ready to summarize

and / or

tell what you just learned in a different way (in your own words)

This series of 4 pics is the natural result of water dripping through CaCO3

to form limestone in caves described in problem 61

Stalagmitesfrom water dripping down through CaCO3 to form limestone CaO

Stalactites also CaO

Stalactite cavein Israel

Wonder Caves Stalagmites

Very large stalagtitesmeet their opposingstalagmites

3/1/2013 Standards: 4 (Gases and their Properties)OBJECTIVES:  ● Start preparation for Quiz 3.3 (Ch 13.1 & 14)DO NOW: 1. Start HW, ask questions if you don't understand.HOMEWORK: 1. Ch 14 Assess p. 448-449 88 (1. 1.6 atm; 2. 190 K; c. 510 mmHg;

d. 0.96 atm), 90 (1.17 atm), 92 (74.8 kPa), 94 (5.91 x 104 L), 96 (34 L), 98 (2.93 g/L) (5 pts) Std 4

2. Std Test Pract p. 451 1-5 (5 pts) Std 4 ======================================================= BASKET (stamped): Journal 2/28 1. Ch 14.4 PP's p. 443 61 - 64 and Assess 65 - 67 (5 pts) Std 4

Announcements: 1. Ch 14 Quiz 3.3 scheduled for Tu 3/5 (60 pts) 2. Mem Ions 4 (4th time) Fri 3/8 (40 pts) 3. Boyle's Law Lab due Mon 3/4 (15 pts)

Boyle's Law Lab - link for instructions on how to

perform the lab.

http://www.youtube.com/watch?v=r14CiDqWzLQ

1 L

2 L

p. 448 #90