ALEKS: Deducing the ions in a binary ionic compound from its empirical formula

[@nicolethm2002]

I can’t thank you enough. I will share your videos with my entire class since there’s no videos in aleks portal that truly helps with these problems.

[@RoxiHulet]

Thank you!!!!!!!

[@amandathomas3767]

I believe most of the time that ALEKS is a diabolical trickster mastermind. Doc never tricked McFly into becoming a physicist or a a chemist lol. You made this so simple. Let me know if you tutor please! -Amanda

[@RoxiHulet]

I’m not a tutor, but I hope you find a good one soon. :)

[@jayshmay]

I've been trying to brute force my way through my chemistry course, and finally decided to see if someone was explaining how to do these problems on KZbin. Seriously, thank you so much for this. Your channel has just made me feel so much more confident in figuring this out as my professor is not much help when it comes to questions specifically on Aleks.

[@misty1264]

I am so glad I found your channel! ALEKS plays with your emotions! You explain everything so well.

[@RoxiHulet]

Hahahaha, don't let ALEKS push you around :) Thanks for watching and let me know if you ever get stuck on a problem and I don't have a video! I take requests! :)

[@misty1264]

@@RoxiHulet That’s amazing! Thanks again :)

[@krishnaolivares4850]

Thank u!! your ALEKS videos are so helpful!!

[@RoxiHulet]

You're so welcome!

[@aileneroque8320]

Thank you so much, this truly helped me out with my chemistry ALEKS course!

[@cynthiatorres8666]

What if you get something likeMn2 O3?

[@RoxiHulet]

Oooh, tough one! It's pretty similar to the FeCl3 example in my problem. You know the charge of O^2- from the periodic table. Since there are 3 total O^2- ions, you know the total charge of the anions is 6- (3 x 2- = 6-). This means that the total charge of the cations is 6+ (because the positive charge will balance the negative charge). There are two Mn cations, which means each has a 3+ charge (2 x 3+ = 6+).

[@HannahNelson-g4j]

ur saving my life rn btw

[@RoxiHulet]

lol I'm so happy to be helpful - keep at it! It's hard work but you can do it!

[@thedumouchels7340]

Wow! I totally get it now! Thanks for this video!

[@RoxiHulet]

You're welcome!

[@heavytea6645]

Do you have a video on "Deducing the ions in a polyatomic ionic compound"?

[@Aussiex3Oix3]

you are teaching me chemistry. my college teacher sucks! thank you!!!!

[@RoxiHulet]

Haha I'm honored - thanks for watching my videos!!

[@charrogers2994]

Why is Cu2S equal Cu^+ and S^2- and not Cu^2+ and S^2-

[@RoxiHulet]

Fantastic question! For a lot of ionic compounds (including this one), the quantity of one atom is equal to magnitude of the charge of the other atom. So for example, Cu2S has two Cu ions, which means that the charge of S is 2-. And it has 1 S ion, which means that the charge of Cu is 1+. (The ion with the positive charge is always listed first, which is how we know that Cu is 1+ and not 1-). A more in-depth explanation is that the S ion always has a 2- charge. The sum of the positive and negative charges will always be equal, which means the Cu ions have a total charge of 2+. There are two Cu ions, which means each has a 1+ charge.