What are some things that I should memory dump right when I start the test?
Like if you are hoping for a 5!
Anyone know if we have to memorize the different molecular shapes? Or do we just need to know the bond angles forr some of the hybridizations such as sp sp2 and sp3
@shiftydraw I would memorize. They’re unlikely to ask about T shape or the weird ones but there’s usually at least 2 or 3 on pyramidal and planar stuff in the mc or frq. So I would at least know those, the planar and pyramidal.
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you need to memorize it.
Hey, what’s the one type of question where they ask you for acid-base titration and solution concentrations where water as been added, and the answer is that concentrations aren’t affected with the addition of water? Does anyone know what I’m talking about? How does the addition of water not affect concentration? Doesn’t it dilute it? Or is it that a couple mL of water has virtually no effect?
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check out Buffers, mate.
http://media.collegeboard.com/digitalServices/pdf/ap/11_3461_AP_CF_Chemistry_WEB_110930.pdf
Could somebody please explain #1 and #3 on pages 82 and 84 of this PDF, respectively? The answers to the multiple choice are given a few pages after the questions, but I am not sure why those are the answers.
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84 It means, i.e if you chose first model, you wouldn’t be able to identify ammonia’s molecular shape.
@spincrus he is asking about #1 on page 82
Do you guys know if the FRQ are going to have you design a lab? Barron’s has it as one of their open endeds but others do not… Hoping it doesn’t but
I don’t know if you have to design one, but there will be questions related to labwork.
Any suggestions on how to prepare for that??
Can someone explain 1. b. (ii) and (iii) to me? So you have Ca+2 already present in .10M so you must use that in the Ksp equation, and then you just solve for F-, I dont really understand why you do that, and when you would have to plug in [2x]^2 is that only for molar solubility? and what exactly is molar solubility?
And then for (iii). I have no clue why you do that
http://media.collegeboard.com/digitalServices/pdf/ap/apcentral/ap13_chemistry_scoring_guidelines.pdf this is the answer key
and this is the question http://media.collegeboard.com/digitalServices/pdf/ap/apcentral/ap13_frq_chemistry.pdf
thanks!
@denilm its possible, lol lets hope its something easy like calorimetry or grav analysis and not a titration
I feel like titration would be easy
Can someone explain the difference between allotrope and isotope
Can someone explain on the 2014 test
15 - isn’t speed = AKE = temperature?
29 - no clue
47 - are the + and - referring to ions or ions and electrons or what?
49 - not sure how to come to conclusion, is it something to do with hydrogen bonding?
in what situation would we use the henderson hasslbalch equation? its on the formula chart so theres a possibility it shows up
Where do you get the 2014 exam?!?!?!