Q2 – Week 10 – 19-20
week 10
Week of 1/20 – 1/24
1/20 – Monday – OFF – MLK DAY
1/21 – Tuesday- period 7 – Academic Study hall
period 8 –
Equilibrium = the death of a spontaneous process = ΔG = ZERO!!!!!
Equilibrium = the rate of the forward = the rate of the reverse reaction
Equilibrium = the amount of the reactants and products stay constant
Enzymes are biological catalysts that decrease the activation energy for both the forward and the reverse reaction. They could help reversible reactions reach equilibrium faster.
Given the following reaction: NO2 + NO2 —> N2O4
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At point A we have a lot of the reactants ( NO2 ) and very little products ( N2O4 ) and thus the forward reaction is very spontaneous (ΔG = negative). AT point C the reverse reaction is spontaneous (ΔG = negative) because there is very little of the reactants ( NO2 ) to react in the forward direction. This reaction will MOVE toward equilibrium in the reverse as it |
1. Equilibrium – Equilibrium intro demo’s: Tanks, Film canisters, solidification, Oscillating Reaction.
A) REVIEWED PARTS OF THE Energy diagram of chemical reactions.
activated complex, change of free energy, activation energy, what enzymes do
B) Started equilibrium worksheet
Tank / water demo, oscillating reaction
Equilibrium Tanks Demo:
Oscillating Reaction: When is equilibrium reached?
1/21 Tuesday Homework –
1. Please complete the following form below on chapter 8.
I misspelled endergonic in the second choice of question 15!
End of Tuesday..
1/22 – Wednesday – period 7,8
1) Guidance discussion.
2) Enzyme discussion with videos
Enzyme videos:
Lab period – Catalase Lab –
Start the Catalase Lab/explanation
1/22 – Wednesday Homework:
1. Make a second submission on ATP/Enzyme form from last night.
2. Complete tonights form based on the instructions of the lab and Thermodynamic principles of the chemical reaction occurring in the Lab:
2H2O2 -> 2H2O + O2
Tonights Form:
End Wednesday….
1/23 – Thursday – period 7 – Academic Study hall –
period 8 –
1. Complete the Catalase Lab data gathering
1/23 – Thursday – Homework
1. Complete your Genetics Test Corrections
2. Complete the Catalase Lab – DUE MONDAY
On the back of the lab please
a) list each independent variable that was tested
b) Explain the outcomes based on your knowledge of enzymes, collision theory, or
energy why each variable caused each outcome.
3: Please view both videos below to answer the form on cellular respiration below:
1st video: <iframe class=”edlio-embed-player” type=”text/html” width=”640″ height=”360″ src=”//draper.summitacademyschools.org/apps/embed/?v=99426″ frameborder=”0″ allowfullscreen></iframe>
2nd video:
End Thursday..
1/24 Friday – period 7, 8 – Academic study hall given
1. Gave back Cell Respiration form 1 Homework (last nights)
2. Reviewed Cell Respiration basics – Proton motor force with videos of ATP -synthase
3: pH basics
Not sure we will get to this today:
Today we learned that acidic (pH that is lower than 7) and basic (pH that is higher than 7) solutions
can potentially be harmful to enzymes due to the fact that these tertiary proteins have R groups that will change according to pH of the solution.
Acidic R groups have -COOH endings that will become -COO– (have a negative charge) because the H+ will be taken by the base in a basic solution. So proteins that have amino acid that have R groups that are acidic will become negatively charged and they will attract other R groups that are positively charged. If the R groups change their attractive partners then THEIR SHAPE and thus THEIR FUNCTION changes. (Basic R – groups will also become charged (+) in the higher pH solutions.)
A permanent change in the shape of the protein is called DENATURING. A denatured protein or enzyme will have no enzymatic properties as the active site will no longer have the shape to interact with the substrate.
All enzymes have optimum pH ranges and optimum temperatures that they work most effectively:
Classwork:
1/23 – Friday Homework:
Everything that you are doing this weekend is FOR the second test this quarter (which is Tuesday!)
1. Complete the Catalase Lab – Due Monday
On the back of the lab please
a) list each independent variable that was tested
b) Explain the outcomes based on your knowledge of enzymes, collision theory, or
energy why each variable caused each outcome.
2. Please complete the Cellular Respiration worksheet up to the end of the page 4. Please use your book in chapter 9 help answer your questions. I have posted a key but please try to answer on your own first. The harder you try to answer these on your own will give you a deeper understanding.
3. Please complete the following worksheet, pH worksheet.pdf.
I know that I forgot to print it out for you. I feel bad..
*One additional point here is that the hydronium ion (H3O+) is water holding onto a H+ and thus is the same as H+ that come from acids. If you need more review from this topic please use this link to review acid /base basics:
https://youtu.be/KNaNDMIgRm8
pH worksheet.pdf
4. Complete the form – (which COULD have test like questions on it) below:
End of Week 10 and the second quarter!