Michael Farabaugh

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@roomba6071 18 сағат бұрын

im cooked

@theleaf6772 3 күн бұрын

This video helped me a lot. I just don't understand how a ionic compound like NaCl can conduct electricity when molten. What I am guessing is that since it is molten, heat has been applied to NaCl (s). The heat provides kinetic energy to NaCl(s). This kinetic energy overcomes the ionic bond between Na+ and Cl- which makes them disassociate, freeing them from the crystal lattice. Since they are free flowing, they can conduct electricity. Though that is just my hypothesis with a background of a couple months of taking AP Chem. Could you clarify this for me?

@mrfarabaugh 2 күн бұрын

@@theleaf6772 The ions of Na⁺ and Cl⁻ are charged particles. The flow of electricity is basically the flow of electrons through a wire. Electrons are also charged particles. In solid NaCl, the ions are unable to move and flow. Therefore the electricity cannot flow through that solid. When NaCl melts, the solid structure changes into a liquid. In the liquid form, the Na⁺ and Cl⁻ particles are no longer locked in a rigid Crystal lattice. They can move and flow because of that increase in kinetic energy that you mentioned, which had broken up some of the attractions between the ions.

@theleaf6772 2 күн бұрын

@@mrfarabaugh Thank you. This really helped my understanding.

@arisamarie8594 6 күн бұрын

Thank you,, you are helping me understand 🙏🙏

@benjidamenji3428 8 күн бұрын

who's here from parra's class

@waldo02 11 күн бұрын

For 19c, an alternative way to determine k would be to find the slope when plotted 1/[C4H6] vs time. When we use data from this linear graph. The slope calculates out to 5.0 M^-1 s^-1. Shouldnt these values agree?

@mrfarabaugh 5 күн бұрын

Good question! The challenge that is associated with any study of the reaction rate is that the coefficients of each substance are not always identical. Therefore the rate for change of individual substances will not always be the same. In that chemical reaction, the rate of disappearance of C₄H₆ is TWICE AS MUCH AS the rate of formation of C₈H₁₂. If you check out this document, linked below, it is the official scoring guidelines for the 2016 AP Chemistry Released Free Response Questions. You will see the answer to Question #5 part (c). Accepted numerical answers for the value of the rate constant, k, were both 2.5 and 5.0, with units of M⁻¹ s⁻¹. bit.ly/3BhIxPs

@dinakhaled7491 11 күн бұрын

your videos are extremely helpful thank you for your effort

@vincentt.6421 13 күн бұрын

Sir your measuring object section was amazing I had a question on this exact topic but didn’t practice this beforehand

@ZeyadB-t7x 13 күн бұрын

Hello, thank you for these incredible videos and the accompanying packets. Have you thought about publishing the review packets in book format? Spiral bound. It would be something I, and I'm sure many others, would be willing to pay for.

@asylum2200 16 күн бұрын

Thanks a ton for sharing these and taking the time to make them to help others. best vids for ap chem on youtube period.

@October-rm9bh 20 күн бұрын

thank youuuu 🙏🏻🙏🏻

@smoltrans 23 күн бұрын

Big fan of your work, really helps reinforce what i learn in class

@onionman3828 24 күн бұрын

These videos are incredibly hepful. I honestly don't know what I would do without them. Thank you for your work.

@WRDAlaissamy 25 күн бұрын

thank you sir, our entire ap chem batch thanks you profusely! greetings from the UAE

@TristanFlaspohler 25 күн бұрын

Congrats Mr. Farabaugh on winning the $50,000 on Jeopardy

@Anonymouse234_1 25 күн бұрын

Ward,Ahmad abdelmagid( Japanese and American guy) big fans

@reevasingh4916 26 күн бұрын

These practices help so much! I'm unexpectedly (almost) failing AP Chem and these teach sm for the test!!

@kaitlyn8185 27 күн бұрын

Hi! Former AP Chem student here. TYSM for all your help last year! Going through all your unit and subtopic practice questions helped me get a 5 :) I'm taking AP Physics 1 now, and I was wondering if you knew of any resources that had practice questions AP style aligned directly with the CED subtopic standards. Basically an AP physics version of your videos? Thank you!!

@Tam3603 27 күн бұрын

for a (ii) for question 7 shouldn't -1.84 be multiplied by 2? You even said it in the video you just didn't do it when you did the calculation

@mrfarabaugh 27 күн бұрын

51:46 Take a look at the Guidelines for Manipulating Half-Reactions, which appears at 51:04 in the video. These guidelines are listed in the packet directly under the essential knowledge statements for Topic 9.8 (Cell Potential and Free Energy). One of these guidelines is the following. "Multiplying a half-reaction by a constant N does NOT change the value of E°."

@juliehahm385 27 күн бұрын

Your willingness to share your material makes me a better teacher and my students benefit from that! Thank you!!!

@Anonymouse234_1 27 күн бұрын

Thank you mister. Marwan is really big fan

@jacobh2347 29 күн бұрын

@theleaf6772 29 күн бұрын

why was this deleted and re-uploaded?

@mrfarabaugh 29 күн бұрын

@@theleaf6772 During this school year, I will be going through each of the videos in this playlist to determine if changes need to be made that reflect the slight changes that occurred in the AP Chemistry Course and Exam Description (CED). kzbin.info/www/bejne/apTak2uNoqaNsNkfeature=shared

@theleaf6772 29 күн бұрын

@@mrfarabaugh oh ok. Also do u know Mr. Nguyen?

@obamacrockadile2136 Ай бұрын

thank you mr farabaugh

@AgAukz Ай бұрын

it will be good to know what you updated from last video. Is it different than other 3.2 -3.4 video? new problems added? new concept added? thanks in advance

@mrfarabaugh Ай бұрын

@@AgAukz This new video contains the same problems as my previous video. This update was needed because the layout of the AP Chemistry equations sheet had been updated. I wanted to show that new information as I was demonstrating how to solve these problems involving gases.

@WRDAlaissamy Ай бұрын

thank you alot dr.michael

@Kass0114 Ай бұрын

Name 30 arctic monkeys songs

@obamacrockadile2136 Ай бұрын

Thank you for all these videos, my test grades increased a ton after watching these.

@St1diot Ай бұрын

You're carrying my AP chemistry class on your back 🙏

@garlic1387 Ай бұрын

ong mine too

@kkian07 9 күн бұрын

@@garlic1387 bro im actually so lost Michael is coming in clutch bro

@futbolmaks3759 Ай бұрын

Awesome 😎

@mohamedfarhat2313 Ай бұрын

Great and helpful video sir. I will have my first chemistry unit 1 test and your videos are fenomenal!

@ZeyadB-t7x Ай бұрын

Thank you, Michael. This video and the accompanying practice test are awesome.

@crashtither6816 Ай бұрын

More people need to know about this channel

@aduggan8952 Ай бұрын

If I defeat you in a fight do I gain full understanding of all chemistry

@haniahcomonog7128 2 ай бұрын

I LOVE YOU THANK YOU😫😫😫

@AbdallahAttiaA 2 ай бұрын

here i am in 2024 still learning from the video thank you

@nolegsme 2 ай бұрын

please do more I really need it please please !!!!

@dinakhaled7491 2 ай бұрын

for ur effort

@Y4AKl 2 ай бұрын

He covers every type of question that might come on a unit 1 test in a packet of 9 pages W Mr. Farabaugh carrying me in Pre-AP Chemistry

@zerereka 2 ай бұрын

36:47

@gau.ravofficial 3 ай бұрын

Ka be professor ka bo rhe ho 😂

@daddylonglegs2744 3 ай бұрын

Ms. Lee if you’re looking at this screw you

@OfficalMPSBVB 3 ай бұрын

for question 21 why wouldnt u do just 18.016 why do u need to multiply by 2 since were only trying to find H2O not 2H2O

@mrfarabaugh 3 ай бұрын

The chemical formula of calcium chloride dihydrate is CaCl₂•2H₂O For every one mole of this substance, there are TWO moles of H₂O 2 moles of H₂O = (2)(18.016) = 36.032 g 1 mole of this substance = (40.08)+(2)(35.45)+(36.032) = 147.012 g Mass percent of H₂O in this substance = (36.032)/(147.012)x100 = 24.51%