ALEKS: Predicting relative boiling point elevations and freezing point depressions
How to predict changes to the boiling and freezing point of a solvent.
Жүктеу.....
Пікірлер: 21
@karajohnson9136 ай бұрын
Thank you. What you do helps a lot. I get very frustrated with Aleks. Last semester I refused to do it. It costed me an "A", I don't want to do that again, and I did not have the patience for Alex last semester but I'm not going to cost myself a letter grade this semester so what you are doing is very very much appreciated thank you so much.
@RoxiHulet
6 ай бұрын
Oh dang, that's really unfortunate - I'm glad that you're going to stick with it this semester. I have a ton of videos - you can *absolutely* get through ALEKS :)
@iLYKEf00d3 жыл бұрын
you're saving me right now, thank you so much.
@RoxiHulet
3 жыл бұрын
You’re welcome!!!
@Cryinghorseman3 ай бұрын
I got a problem that used an 'HI' compound and the answer gave it a i = 2. Isn't HI not ionic?
@sydneyrice45252 жыл бұрын
I dont know if you'll see this in time but for instance, say you have KCH3CO2, and K2SO4, would the i values for these be i=2, and i=3, respectively? becuase there is 2 K's in the first and 1 in the second?
@RoxiHulet
2 жыл бұрын
Yep, you got it. Good job!
@electron-xgaming24442 жыл бұрын
How do you know what i = if you have the element KCH3CO2? There's only one cation and multiple anions.
@RoxiHulet
2 жыл бұрын
CH3CO2 is the polyatomic anion “acetate”, so this compound has one cation and one anion, and i = 2.
@electron-xgaming2444
2 жыл бұрын
@@RoxiHulet That makes sense thank you so much!
@zionsimanian93102 жыл бұрын
Roxi if you see this could you possibly make a video on the topic called “Using molarity to find solute mass and solution volume”? If you ever make one in the future , thank you!!
@twentyjunes1167
3 ай бұрын
You’ve likely long left the chem class you were taking by now, but she did end up making a video on that topic!
@yohannagarcia61772 жыл бұрын
im alittle confused on how you went from ml to g to kg? can you please explain!
@RoxiHulet
2 жыл бұрын
The density of water is 1 g/mL which means 1 g of water = 1 mL. And there are 1000 g in a kg, so to convert from g to kg, you divide g by 1000.
@samanthadavantes35993 ай бұрын
A chem student hero
@akshadakulkarni9607Ай бұрын
Hi I'm really confused on what you mean by "the least significant change". I am just not able to connect the dots on how that is helping figure out the order they should be put in.
@RoxiHulet
Ай бұрын
Least significant change = smallest value of delta T = smallest deviation from the boiling or feeezing point of pure water
@akshadakulkarni9607
Ай бұрын
@@RoxiHulet so the smallest value of delta T would be the lowest freezing point and the highest boiling point? Thank you so much for your help! Your videos are life savers!
@RoxiHulet
Ай бұрын
@@akshadakulkarni9607You’ve got it backwards… boiling point always goes up, and the amount that it goes up is equal to delta T. So the *largest* delta T will have the highest boiling point. Freezing point goes down, so the *largest* delta T will have the lowest boiling point. This is tricky stuff - don’t give up!!
@akshadakulkarni9607
Ай бұрын
@@RoxiHulet I think I get it. I will keep trying to understand it better. Thank you so much!
@RoxiHulet
Ай бұрын
@@akshadakulkarni9607 you’re very welcome! You can totally do it!!! I believe in you :)
Пікірлер: 21
Thank you. What you do helps a lot. I get very frustrated with Aleks. Last semester I refused to do it. It costed me an "A", I don't want to do that again, and I did not have the patience for Alex last semester but I'm not going to cost myself a letter grade this semester so what you are doing is very very much appreciated thank you so much.
@RoxiHulet
6 ай бұрын
Oh dang, that's really unfortunate - I'm glad that you're going to stick with it this semester. I have a ton of videos - you can *absolutely* get through ALEKS :)
you're saving me right now, thank you so much.
@RoxiHulet
3 жыл бұрын
You’re welcome!!!
I got a problem that used an 'HI' compound and the answer gave it a i = 2. Isn't HI not ionic?
I dont know if you'll see this in time but for instance, say you have KCH3CO2, and K2SO4, would the i values for these be i=2, and i=3, respectively? becuase there is 2 K's in the first and 1 in the second?
@RoxiHulet
2 жыл бұрын
Yep, you got it. Good job!
How do you know what i = if you have the element KCH3CO2? There's only one cation and multiple anions.
@RoxiHulet
2 жыл бұрын
CH3CO2 is the polyatomic anion “acetate”, so this compound has one cation and one anion, and i = 2.
@electron-xgaming2444
2 жыл бұрын
@@RoxiHulet That makes sense thank you so much!
Roxi if you see this could you possibly make a video on the topic called “Using molarity to find solute mass and solution volume”? If you ever make one in the future , thank you!!
@twentyjunes1167
3 ай бұрын
You’ve likely long left the chem class you were taking by now, but she did end up making a video on that topic!
im alittle confused on how you went from ml to g to kg? can you please explain!
@RoxiHulet
2 жыл бұрын
The density of water is 1 g/mL which means 1 g of water = 1 mL. And there are 1000 g in a kg, so to convert from g to kg, you divide g by 1000.
A chem student hero
Hi I'm really confused on what you mean by "the least significant change". I am just not able to connect the dots on how that is helping figure out the order they should be put in.
@RoxiHulet
Ай бұрын
Least significant change = smallest value of delta T = smallest deviation from the boiling or feeezing point of pure water
@akshadakulkarni9607
Ай бұрын
@@RoxiHulet so the smallest value of delta T would be the lowest freezing point and the highest boiling point? Thank you so much for your help! Your videos are life savers!
@RoxiHulet
Ай бұрын
@@akshadakulkarni9607You’ve got it backwards… boiling point always goes up, and the amount that it goes up is equal to delta T. So the *largest* delta T will have the highest boiling point. Freezing point goes down, so the *largest* delta T will have the lowest boiling point. This is tricky stuff - don’t give up!!
@akshadakulkarni9607
Ай бұрын
@@RoxiHulet I think I get it. I will keep trying to understand it better. Thank you so much!
@RoxiHulet
Ай бұрын
@@akshadakulkarni9607 you’re very welcome! You can totally do it!!! I believe in you :)