<p>i would just know some simple indicators like litmus and pheno.</p>
<p>for pheno i mad this stupid thing: PAC which is pheno indicated an acid when it is colorless and u could figure the other one out easily base/pink.</p>
<p>for litmus i haven’t exactly thought of one…</p>
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<p>Just bringing attention to this, previously posted on the last page.</p>
<p>ALSO are buffers tested on the free-response?! I just did 2007 and that’s the first time I ever saw it!</p>
<p>If you get 2 correct, you get half points.
and Yes, buffers are a big part of FR.</p>
<p>Oh my God, I had no idea buffers were huge . . . I just failed the buffer question!
Do they appear frequently?</p>
<p>Also a buffer is a weak acid and it’s conjugate base?
I heard it was like . . . twice the number of moles of conjugate base or something.</p>
<p>YESSS Definately. Buffers are a part of acid and base. So you should think that it will most probably turn up
Also, my teacher predicted that Kb/Ka might turn up tomrw. I’m relieved. I HATE Ksp</p>
<p>xing615, i don’t think u will have time to look through those notes lmao unless ur a fast test taker. what i plan on doing is writing down some stuff i won’t be able to remember in my calc and if they pop up on the mcqs ill wait till part 2 and check the notes and once i am done with part 2 i will go back to mcqs with the notes in ma head.</p>
<p>orangefoot was exactly is Kb/Ka
also anyone wanna give me walkthrough about buffers!?
wanna quickly give me a walkthrough?</p>
<p>Also, what time are you guys going to stop revising?
My teacher told me to watch a movie at 8pm to cool my head. No way. But is sleeping at 12am and going over simple stuff at 10:00pm reasonable? </p>
<p>I have no idea when I should sleep to be the best possible test taker at 7:30am…</p>
<p>Buffers can be weak base, conj. acid (acidic soln.) or weak acid, conj. base (basic soln.). It’s not too different from Ka/Kb etc, IMO.</p>
<p>Buffers are solutions with a WEAK base or acid and its conjugate acid or base respectively. They’re used to maintain a stable pH. So Something like HC2H3O2 and NAC2H3O2 forms a buffered solution. You should use an ICE chart to find the equilibrium, and just count the [NaC2H3O2] as [C2H3O2-] and do the ICE for HC2H3O2 -> C2H3O2- + h+</p>
<p>Sleep like you normally do. Don’t watch a movie because that will distract you and disrupt ur memory.</p>
<p>Guys I’m going to die . . . buffers are so confusing.</p>
<p>Would anyone be able to explain <a href=“Supporting Students from Day One to Exam Day – AP Central | College Board”>Supporting Students from Day One to Exam Day – AP Central | College Board;
number 5. c)ii. and iii.?
No matter how many times I read the paragraph it just doesn’t process . . .</p>
<p>Ksp was last years question 1 so your teacher is probably just assuming it won’t be this year… I hope it isn’t either haha. The year before I think it was Kp so it could be anything honestly.</p>
<p>I’m going to sleep at 4AM or so. Then I’m going to sleep 2 hours to get 1 REM cycle and start preparing again at 6AM.</p>
<p>@chicken acid/base</p>
<p>at orangefoot well i am sleeping late night(possibly around 4 am) cause i have to do ap psych cram also starting at 7:30 pm</p>
<p>Okay… Never in my life have I heard of galvanic cell…</p>
<p>Hey, just jumping in. There are a couple different “R” values out there, one for gas laws and one for thermodynamics…What are the values and their units?</p>
<p>Lets review solubility rules</p>
<p>wow, I don’t know wt* they are saying in c) ii)… but c, i) is pretty same as making a net ionic eq.</p>