Archive – Q2 week 4 – 19-20
Week of 11/25 – 11/26
11/25 – Monday – period 2 –
1: Discussion on identification of oxidizers, strength of oxidizers,
oxidation agents based on net potentials, Standard cell Experiment
2: Using Table J unfortunately!!
3: Old penny/New penny demo
period 3/4 –
1: Discussion on identification of oxidizers, strength of oxidizers,
oxidation agents based on net potentials, Standard cell Experiment
2: Using Table J unfortunately!!
3: Old penny/New penny demo
Demos:
#1) Acid added to metals (the action of acid is actually a redox reaction):
Metal(s) + 2 HCl => Metal Chloride (aq) + H2 (g)
Ex: Mg (s) + HCl => MgCl2 (aq) + H2 (g)
NET ION: Mg(s) + 2H+ => Mg+2 + H2 (g)
The proton is heat sinking missile for the loosely held electrons of the metal and it cause the oxidation (loss of electron) of the metal and thus H+ is the oxidizing agent. It however it not strong enough to pull electrons from all metals.
Penny Demo:
Using our understanding spontaneity we can hollow out a post 1981 penny.
11/25 – Monday’s Homework:
1: Please complete the Redox – Activity Series net potentials.pdf worksheet and use the key to review.
I made a mistake on number 3 of the backside. I asked for a metal but just change metal to “chemical species” and you will be good.
2: Please complete the Redox 4 – Net potentials Demonstrations worksheet 1213.pdf worksheet and use the key to review.
Lab 13 Calculations we will do tomorrow in class for period 4!
a) standardizing KMnO4
b) determining the oxalic acid concentration
* I made 0.100 molar KMnO4
* and 0.025 molar H2C2O4
End of Monday..
11/26 – Tuesday – period 2/3-
1. Review Aspirin titration
2. Thanksgiving humor.. *FISH!!!!
3. LAB 13! – Titration of Oxalic acid – Hmmm is this redox or acid/Base volumetric titration?
(informal lab write-up)
a) standardizing the oxidizing agent (oxidizer or the chemical that got reduced).
b) Titrating Oxalic acid to determine it concentration.
– period 4
1. Thanksgiving humor.. *FISH!!!!
2. Final Titration – Lab 13 –
a) determining the oxalic acid concentration
* I made 0.0100 molar KMnO4
* and 0.025 molar H2C2O4
11/26 – Tuesday – Homework:
Long range planning – Individual test on Volumetric Titrations –
Tuesday or Wednesday 12/3 or 12/4
I may give you the objective and you will design on paper all of the solutions needed to complete the objective and the procedure. Sound familiar. I will give you the arbitrary values.
So for all of my LVP’s out there you may want to contribute to LAB 13! or at least understand what the MVP’s have done for you!
End of Tuesday..
11/27 – Wednesday – Happy Thanksgiving Eve..
11/28 – Thursday – Happy Thanksgiving!
11/28 – Friday – Happy Post Thanksgiving!
End of week 4!