Glad you're enjoying them Alex! If you plan to watch several of them I'd recommend downloading the outlines that are a companion to the videos from the free course on chadsprep.com. You'll find them helpful in note-taking.
@@ChadsPrep oh i didn't know that, i'll check that out! You know i just wanted to congratulate you, bc apart from being a good teacher you seem like you love what you do, and thus make it fun. We need more chem teachers like you, i hated chem until i started following people like you on yb and now it is one of my favorite subjects!
The standard formula you'll find in any textbook omits the negative sign exactly as you present. Delta Tf = (i)(Kf)(m). But you should realize that freezing points go down and they expect you to realize that for freezing points you subtract the change from the normal freezing point. I simply decided to include the negative sign in the formula so that it is consistent with how we deal with Delta in any other context. When I teach this in person I make sure students are aware of this difference in the formula I provide and the one in their textbook. If I didn't mention this in the video my apologies but I'll be sure to do so next year when I produce an updated series. Hope this helps and happy studying!
Hey Chad, I was wondering, for the transition metals, how do we determine the number of valence electrons? For example, in Vanadium, would it have 2 valence electrons (from 4s) or 5 valence electrons (from 4s + 3d)? Thanks in advance!
Hey Genevieve! For the transition metals it is a little tricky. If the d orbitals are partially filled then you include both the s and d electrons. So in the case of vanadium we would have 5 valence electrons: [Ar] 4s^2 3d^3 The tricky part is that when the d orbitals are completely full then we no longer consider them valence but part of a filled core shell instead. So in the case of bromine it is readily known that like all the halogens it has 7 valence electrons: [Ar] 4s^2 3d^10 4p^5 So the valence electrons include the 4s and 4p electrons but not the 3d electrons in this case. Hope this helps!
You need the boiling point constant. On a homework question they may be expecting you to look it up, but on an exam it is something you are most likely to be given.
I wish you were my chem professor this semester, because mine sucks. I doubt I would have struggled so much if you were.
Seriously, these are awesome lectures. Really clear and quick, thank you!
Glad you're enjoying them Alex! If you plan to watch several of them I'd recommend downloading the outlines that are a companion to the videos from the free course on chadsprep.com. You'll find them helpful in note-taking.
@@ChadsPrep oh i didn't know that, i'll check that out! You know i just wanted to congratulate you, bc apart from being a good teacher you seem like you love what you do, and thus make it fun. We need more chem teachers like you, i hated chem until i started following people like you on yb and now it is one of my favorite subjects!
@@alexrosellverges8345 That's what i like to hear: you love learning chemistry and i love teaching chemistry...PERFECT!
U teach really perfect . It has helped me clear my doubts .😊
Awesome! Best on your upcoming exam!
OMG Mister Chad! I am a nontraditional student! SIr, you explain it well for me to understand! Thanks!
Glad you found this lesson helpful Maricela! Best in your studies!
This literally helped me learn this and with Delta at the same time. Your students are lucky.
Glad you found us - Happy Studying!
@@ChadsPrep thanks!
👍👍👍
You explained it very well. Thank you. ☺️
You're welcome, Rheynell - thanks for saying so!
THANK YOU! amazing video!
You're welcome, sandra l - Thank you!
this video really makes it like duh anybody could do this when my professor turns it into rocket science
Glad the video helped you, Shower!
Thanks for vid . It really helped me 😊
You're welcome, SK!
nice video...for Calcium chloride if it dissociates to give ions do we put 3 or is it 2 on the (i) in the boiling point elevation formula
i = 3 as you have 1 calcium ion and 2 chloride ions! Hope this helps! That is part of the reason CaCl2 is used for salting the roads.
what is the freezing point depression law called?
In my classes the formula for the freezing point depression is Tf=Kf(m)(i). is that the same?
The standard formula you'll find in any textbook omits the negative sign exactly as you present. Delta Tf = (i)(Kf)(m). But you should realize that freezing points go down and they expect you to realize that for freezing points you subtract the change from the normal freezing point. I simply decided to include the negative sign in the formula so that it is consistent with how we deal with Delta in any other context. When I teach this in person I make sure students are aware of this difference in the formula I provide and the one in their textbook. If I didn't mention this in the video my apologies but I'll be sure to do so next year when I produce an updated series. Hope this helps and happy studying!
@@ChadsPrep Hoping for the updated series!😄
Im a huge fan
Glad to hear it!
All non-ionic factors have van't Hoff factor of 1?
Hey Chad, I was wondering, for the transition metals, how do we determine the number of valence electrons? For example, in Vanadium, would it have 2 valence electrons (from 4s) or 5 valence electrons (from 4s + 3d)? Thanks in advance!
Hey Genevieve! For the transition metals it is a little tricky. If the d orbitals are partially filled then you include both the s and d electrons. So in the case of vanadium we would have 5 valence electrons: [Ar] 4s^2 3d^3
The tricky part is that when the d orbitals are completely full then we no longer consider them valence but part of a filled core shell instead.
So in the case of bromine it is readily known that like all the halogens it has 7 valence electrons: [Ar] 4s^2 3d^10 4p^5
So the valence electrons include the 4s and 4p electrons but not the 3d electrons in this case.
Hope this helps!
How do I figure out boiling point with no information? All I have is Molarity and aqueous solution.
You need the boiling point constant. On a homework question they may be expecting you to look it up, but on an exam it is something you are most likely to be given.
My professor sucks i think this dude will be my tutor
Welcome to the channel, S.C.!
goat
You must mean 'Greatest of all Time', then: Thanks for saying so! If for some other reason, then: sheep / dog / cat / horse / cow / etc.....😁😁😁