so do we need redox balancing?
Then it sounds pretty easy to score a 3. I mean I basically haven’t learned anything from my teacher this year ( her first time teaching), and I think I can get around 30 on the mc. That means a 3 is right in my range.
Honestly really hoping for a 4…I did a practice test (just the multiple choice) and was extremely close to the percentage of a 4, and I think the free response will boost that!
do dissociates and ionizes mean the same thing?
Stupid question but can we use a graphing calculator or do we need a scientific calculator?
@shiftydraw - There are polar/nonpolar bonds, then there are polar/nonpolar molecules. A nonpolar molecule can have polar bonds, as long as the dipoles cancel out (look for 3D symmetry). The dipoles don’t cancel out in a polar molecule, resulting in an uneven charge distribution.
@bm1999 - Graphing, and they’re not cleared.
Do we need to know the indicator colors? It’s in my PR book and on the review sheet @portraiture97 just posted but I don’t remember ever learning specifically about them.
@APScholar18 yes.
If a 5 really is 44/50+ then thats reallllyyy hard…
@bm1999 yes to which of my questions???
The Ionization one.
@APScholar18 you look at only the numbers after the decimal poit when dealing with pH sig figs. Examples:
pH=1 or pH=12 has zero sig figs
pH=1.0 or pH=3.4 has 1 sig fig
pH=1.04 or pH=4.56 has two sig figs
pH=12.3 has one sig fig
So pretty much the same as normal calculations, except subtract one, or ignore the very first number.
Never mind my Calculator question I got the answer.
@portraiture97 , how many on the mc did you get right?
@heckarad usually they just give you a chart of indicators and their pKa from there you would choose the best one for the given titration, that’s how i’ve most commonly seen it done
@JuicyMango - I’m just practicing FRQs at this point. I don’t think I’ll be able to raise my MC score by more than 5 points, so crossing my fingers that my FRQs will put me in the safe range for a 5 (also, an FRQ point > a multiple choice point, whoo)
@shiftydraw
I’m not quite sure what you’re asking. Are you talking about why a tetrahedral molecule is not always non-polar?
Nonpolar molecules have both symmetrical pole directions AND magnitudes. CCl4 is non polar since each C-Cl bond has equal magnitudes of electrostatic forces. But CH3Br is polar even though the geometry is symmetrical.
@heckarad My chem teacher suggested we know the spot test precipitates / indicators, so I would just review a little
Do they allow +/- 1 on sig figs?
@portraiture97 you don’t need to know that for the new exam.