The "Rule of 100" for Equilibrium (ICE Table)

[@evanmsitler1]

Cool beans man. My Chem Professor has been using this method, referring to it as the "simplifying assumption", Every time he brings it up during equilibrium he rushes through the method without actually explaining what he's doing. Thanks for the breakdown. very helpful.

[@zubincannivady2589]

Hey man, just hope you know that this video you uploaded 7 years ago has helped me today. Thanks a million!

[@jirehpellazar3054]

dudee funny seeing you here

[@zubincannivady2589]

@@jirehpellazar3054 LMFAOOOO THE ODDS 😂 but yea I was so confused when he taught it in class😂😂😂

[@TheCanadianKush]

If a millionaire drops a dollar he isn't a millionaire anymore... I think he'd be pissed

[@boss8177]

that's assuming that the person has exactly one million dollars which he probably doesnt. He might have 1 million and 1 dollar or more...

[@IvanMTG1]

HILARIOUS!

[@sanchezmd605]

In my university, they taught us "the rule of 1000" where c/k should be greater than 1000 in order for -x to be removed.

[@ompatel621]

in high school I use 500. Increasing the number I guess can potentially lower the accuracy of the answer

[@IvanMTG1]

i love your channel, such grace, such intelligence, such clarity

[@GioZane14]

Thank you for clarifying this, couldn't find anything like this on the web

[@berezker]

How come they never teach this in some schools? We tediously have to use the quadratic equation to find this which takes ages especially numbers less than 1 like 0.024

[@mynameisblaise1]

What is the border line for how small x is to be considered insignificant to the equation? -Matt Takane

[@chuelo858]

How "small" does K have to be to assume it has "negligible" effect?

[@olo33xmillz99]

Kc values less than 10^-5 tend to have a negligible effect but you still have to check. 10^-4 may or may not. Bigger values tend than those previously mention more likely than not will have a significant effect.

[@freedomofspeech122]

To know if X is negligible, there are two ways to check. One is calculating Concentration divided by the Constant (whether its Kb or Ka), and finding is greater than 100. If it is, it's neglible. If not, do the quadratic formula. If percent ionization is under 5%, you're good. The other way is to check if the constant is much smaller than the original concentration, which also makes the influence of X insignificant. Hope that helps.

[@jordanbryant7285]

what if you have two initial concentrations? Would you multiply them or add them, then divide by 100?

[@jasen951]

You use the smallest non-zero initial concentration

[@VSPG_SIVANI]

It's coincidental that I too have cold while watching this video, Nate

[@jamifrig]

it would be a bit less confusing is you used M for concentration in the C/K expression but still a lot better than however my professor attempted to explain it

[@vannahbliss]

oh my goodness I wish I would've known this earlier in the semester! Thanks for the video, at least it'll be helpful for my final

[@romantsar8344]

how did you do on your final

[@emitain8408]

What about if you have a coefficient before the x?

[@kennthii1]

May I ask what "Constant" exactly means? I don't have a clear definition and image of it. What will happen if constant of something is very large of small? And what does it represents?

[@queenrose7202]

What if you don't have Keq and are only given a pressure of initial and a pressure of final? After you use the quadratic equation, how do you know which x to use?

[@kevincorvallis]

You helped me so much. Thanks homie

[@utubemusiccritic]

Never saw "Rule of 100" in a textbook. However, some textbooks (e.g.- Zumdahl) use the better known "5% Rule." Google it for more info.

[@pandugus1550]

Check : Brady - Chemistry The Molecular Nature of Matter 6th ed. Page 783

[@OCoptimusconvoy]

Wow this was extremely helpful thank you!

[@hehehhgujgi5064]

Thank you, so so much, helped A LOT

[@dcheney4041]

3:25

[@xtcy7137]

What if your Kb is 1.8^10 8 ??? A big number?

[@zubincannivady2589]

I know im a year late, but that means you can't ignore it and have to use the quadratic formula. if you see this im sure youve already graduated highschool and hence dont need it anymore (unless ofc youre trying to become a chemist)

[@madihatahira7063]

Thanks :D i really needed this

[@tenn1sball3r88]

Do you happen to have Professor Smyth? lol. That's my chem professor and it's like he's on speed every lecture.

[@s.chauhan6423]

different states?

[@manigill8571]

it has to be greater than 1000 not 100. Just in case if someone is confused about tho

[@CinShummi]

I tried calculating it and was confused about the findings. Thanks for clarifying this.

[@maxmarshall1260]

Lol then why is it the rule of 100... did you even watch the first 3 min of the vid?

[@NurseCloud9]

My school does it by 500😬

[@paulsimon5578]

@@CinShummi How did you do the calculations?

[@Strom308]

If the exponent of the Kb is less than 10^-3 you can assume that x is negligible.

[@s.chauhan6423]

if k is smalller than reactin shifts to left

[@GattedGazoo91]

is i K sub b or K sub c

[@liamsiam1]

Rule starts at 3:03 you're welcome

[@Meagoon]

Thank you!!

[@arineko5356]

Thank you so much :3

[@shivpalpatine]

Thanks dawg

[@bitseatgetaneh3381]

Ahhh you're the best!

[@AilindaBaptista]

can't use a calculator on my tests.....-____-........this still helps tho

[@johnfei434]

That's just stupid. I get it if it's math test.. but chemistry no calculator? That's pretty pointless.

[@matthewma6795]

times have really changed 10 years later, calculators are pretty much mandatory now

[@marcostavarez2702]

DO NOT WASTE YOUR TIME ON ICE CHARTS!! theres a way to solve these that takes literally 5 seconds to solve

[@vanessam157]

spill the tea sis

[@tb2748]

For those wondering, he's (probably?) referring to the Henderson-Hasselbalch equation, which really only works if x is small relative to our initial concentration, ie, we can make our assumption that x is negligible. Otherwise, you need the quadratic formula/ICE chart.

[@SamitaSarkar]

lol who disliked this?!

[@fatherpingg]

Probably the teachers LOL

[@aaaa-vo1dg]

spasibo

[@Nijaanth]

you sound like deadpool

[@abduladayel]

This video gave me a clogged nose

[@fetramuhammadfeysal1083]

you are cool

[@randomasshole3114]

Holy shit that was awesome

[@shaheerajaz5129]

Clean your nose before recording

[@romantsar8344]

he probably just had a cold, shaheer