👩🏼🔬 PhD chemist with over 20 years experience teaching college-level general and organic chemistry
❤️ Single mom trying to put a kid through college with a KZread side-hustle
🛍️ As an Amazon Associate, I earn from qualifying purchases. Thanks for your support!
Пікірлер
Why is KZread showing me this?! Where's the damn cat videos??
Wow. The level of stupidity in the comments here.
roxi. my girl. my home girl. finished my aleks chem prerequisites bc of u. i hope ur pillow is cold on both sides tn. i hope you get a puppy. and i hope ur fav song comes on when u get in the car tmr. i hope they make ur coffee j like u want it. u a real one homie best of wishes 😘🫶
Another reason pharmaceutical companies protonate drugs produced in freebase form is to make the compound more stable (a less reactive molecule) and to put it into a form that is more easily dosed. Take dextroamphetamine (used to treat ADHD) and which also is an amine) for example, which when produced is an oily very reactive viscous liquid that decomposes fairly easily. The freebase is usually protonated with sulphuric acid to get dextroamphetamine sulfate, which is a white crystaline solid.
Thank you so much I'm confused with the 0.0257 value. Can you explain on that please
Great question! It is just a constant that is used in the Nernst equation.
I watched this video and the explanation was super helpful since I use Aleks to learn concepts. But I realized after watching this that the stand alone element was always oxidized and the other one was always reduced. So I was able to finish this lesson in a couple mins that way.
You make it so easy to understand!! Thank you so much!!
Your carried me through my chemistry class, so grateful, better than my actual teacher.
Please can you kindly make a video for us on the reaction of isoborneol to camphene please 😊❤
How do you know to change H3N+ to H2N to get positive charge? Please explain.
was stuck on this problem for two hours until I watched this video thank you!!
this makes so much sense omg i used to struggle so bad with this concept!!!
roxiiiiii uare the best
My lifesaver❤
I got confused as hell💀💀
I was so intimidated by this problem but the way you explained it was so simple and straight-forward. Also, I think it's funny when you rethink things like your molecule drawings or your labels. It actually makes it easier for me to pay attention and makes me smile. :)
i just want you to know, you are the best at explaining these aleks topics! i don't understand why aleks explanations cant be this clear. i passed chemistry last semester with a 97 because of you. hopefully this short summer semester I have the same outcome!
YOU ARE SO AMAZING ROXI! I literally could not pass chemistry without you!
I'm a little confused with calculating POH? Could you explain this further?
Sure! I've got 2 videos on pH / pOH. They're mostly about pH, so you can probably skip through a lot of it and just focus on the pOH parts. General info on pH and pOH here: kzread.info/dash/bejne/aKZ-xMSQg7Ovcc4.htmlsi=5mA7-l7xexnV_qH8 Example calculations here: kzread.info/dash/bejne/c3aIlI-EabbYerw.htmlsi=T5Aj-uSxw1X51T5U Let me know if you have questions!
i don't take ALEKS courses but this is a great explanation applicable everywhere
Thank you!!!
I truly hope you get good $ for this channel bc you are legit the best. I watch your videos alone to learn every new concept I need for this wretched ALEKS program. You are a godsend.
Aaaaahhh thank you so much :) I am using the income from this channel to put my son through college and I'm so thankful for students like you who watch!
Every Aleks module I have trouble with, you have and explains it perfectly. There arent words to describe how much I, and many others appreciate you. Thank you so much!
I love this comment, thank you so much!! :)
Ah, getting ready for the next generation of ochem students!
Does digital notes on a tablet also work?
@@hgedio definitely!!!! I think it’s even better than pen and paper notes, but not everyone can afford a tablet.
@@RoxiHulet ok thanks. Also is orgo actually hard for someone that isn’t good at chemistry or doesn’t really like it that much like me? Bc I take the class this fall and I’m scared I might perform badly
@@hgedio I'm not going to lie - yes, it's a pretty hard class. But I am confident that anyone can do well! It's very different from gen chem, so don't assume that you won't be good at it, or that you won't like it. I'm working right now on a set of videos to help people prep for organic, so hopefully those will help you get a good head start! And I have the whole year's worth of ochem here on KZread, and I usually answer questions pretty quickly :)
@@hgedio It's a lot of work, but I think there's a lot of good resources online, including Roxi's channel! I might also recommend "Master Organic Chemistry", and if you need to look up a particular reaction or reactant, google image search can be your friend...
Thanks ❤
Thank you! You explained great!
High Roxy this is Carly I hope to see you soon in the summer 🏝️
My niece!! I love you Carly! Say hi to your mom for me!! We are hoping to come visit in September!
Yay!!❤
Do I hear a cat purring? Thank you btw!! You've successfully helped me receive A's in my chem courses. :)
A's!! I'm super proud of you! Great job!! And yes, that's my very old cat, his name is Benny :)
@@RoxiHulet give old Benny a hug for me :)
How we determine chirality. Carbon rings structure
kzread.info/dash/bejne/hnyqu7KfepmbgtI.htmlsi=dyfZ1nZCY4SWdlad
kzread.info/dash/bejne/c5mEyJWkm86tgZs.htmlsi=nPryGlw3O105FFyM
kzread.info/dash/bejne/p3x3ra9qh8aZqLw.htmlsi=5jOgWlwYZzBh0-mW
Video of boys law
thank you so much for this video! the aleks explanation made the problem even more confusing but your video made it easy to understand!!!!
You're welcome! I'm glad it helped!
where did you get .08206 from?
That is the value of the ideal gas constant, R.
THANK YOU SO MUCH my god you don’t know how long I spent on this before watching these hacks 🥲
You are super welcome!!! :)
Your Aleks videos are REALLY helping me with my College Chem Class! Thank you!
Yay! I'm glad they're helping you!
so helpful!
I'm glad it was helpful!
You are single-handedly getting me through Chem 1 & 2, literally. I don't know what I would do without you. Truly, thank you. Sincerely, a struggling student trying to make it into PA school. 🥲
Wow, thank you! Keep up the hard work - you'll get there!!!!
Is this type of question the same as calculating molar solubility since it says solubility?? or is that two different things?
“Solubility” usually refers to grams / L “Molar solubility” is mol / L However, sometimes people use solubility and molar solubility interchangeably, even though they aren’t the same thing. Always check the units to be safe. This problem is giving solubility (not molar solubility)… and the only reason I know that for sure is that the units are g/L.
Do you always have to change to mols first ?? Sometimes I noticed problems where the molarity is kept ?? How do you know when to change it?
Excellent question! For titrations, yes, you always change it to moles. This is because the volume changes during a titration, which means that molarity is not constant. Other types of ICE tables are typically done in molarity because they are constant-volume problems.
Roxi, you’re actually such a blessing!! I’ve been staring at this problem for the better part of an hour and you helped me understand in 2 minutes!
Yay! Happy to help!!
Roxi, please provide an updated video when we are asked to calculate the molar mass. The data provided are temperature, volume, pressure, and weight of the unknown compound.
I might be over-simplifying, but can’t you calculate the density because you’ve been given the mass and volume?
What formula do we use if the answer is asking for g ?
I explain this at the end of the video. You have a hard version of the problem, so you just have to keep watching all the way through to the end of the video :)
I was hoping to see the mechanism...
Thank you so much for your videos - you are saving me a lot of tears. Question: is there an easy trick to calculate/visualize how many Hs are needed when you go back to edit the chain of carbons?
I'm not 100% sure what you mean by "go back to edit the chain of carbons". Could you phrase that a little differently?
could you give the specs of an ideal set how many, linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral units will be sufficient.
Absolutely! It depends on whether you will use the set for organic or general chemistry. *A great kit for organic* will have about 12-ish tetrahedral atoms in one color - typically black - plus about 6 more in a few other colors, along with about 30 white (hydrogen). You might want one or two trigonal planar pieces (trigonal bipyramidal pieces will work in their place). Organic students typically build one molecule at a time and mostly focus on sp3 carbon atoms, so they don't need a huge variety or quantity of pieces. *A great kit for general chemistry* will have at least 2 each of octahedral, trigonal bipyramidal, trigonal planar, and linear. It will have about 30-40 tetrahedral pieces in a variety of colors, along with probably 30-40 in white. General chemistry students typically build a couple models to compare side-by-side, so they will want a larger number and variety of pieces. The Old Nobby set (or something like it) is really great for someone who wants to get a model kit in general chemistry that will also be useful in organic chemistry. If you're already past general chemistry, the HGS sets are super.
Thanks to this video I mastered how to do it with cyclo’s but I couldn’t do the tetras 😭
Hey you're halfway there, though! I think the cyclics are harder, so I have total faith that you can do the tetrahedrals!
This was very helpful! I’ve been working on this exact topic for hours now and I finally got it 🤩
Yay! I'm proud of you for sticking with it!
Am I supposed to focus on every substituent attached to the carbon in question? For example, in the first chiral group with the chlorine, I didn't realize I was supposed to be taking the CH2 and CL in to account. IS this correct?
Very good question! Yes, you are correct. When you are trying to decide if a carbon is chiral, you will always look at the whole entire collection of atoms coming off each of its four bonds.
It's almost like teachers have a life of their own outside school 😂
😂😂
Whoa, from chemistry to hoses!
Thank you teacher You saved my test😁🙏🏻