<p>@rm2124: [Superbase</a> - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Superbase]Superbase”>Superbase - Wikipedia) Read the second sentence on the page…</p>
<p>strongest BASE. there’s a difference between BRONSTEDBASE and BASE.</p>
<p>ughhhh, i give up, I’ll just forget about this test and get my score when it comes in.</p>
<p>@rm2124: you said co3 2- is stronger than oh- as a base. Wiki says oh- is the strongest base possible in aqueous solution. Where does bronsted base come into play?</p>
<p>Edit: And in this context, if you assume aqueous solution and reactions with water, Bronsted base and Arrhenius base (which is what I’m guessing you meant by BASE) are essentially the same.</p>
<p>OH- is the definition of a base. The concentration of OH- determines the strength of a base. Thus, a solution of OH- will be heavily concentrated, making it the strongest possible base. A bronsted lowry base however is about attracting a proton, which has to do with charges. CO3 2- is more negatively charged than OH -, making it more attracted to the proton.</p>
<p>oh when it talked abt 47.50 ml of .1 M HCl what was the instrument needed for that?</p>
<p>buret. 10char</p>
<p>Yup, most likely retaking this in October.</p>
<p>So is it oh- or co32-??? And how about the ozone harming compound</p>
<p>ozone harming compound is CCl2F2 (chlorofloro carbon)</p>
<p>@rm2124: Well, technically, you can consider the reaction OH- + H2O → H2O + OH-. It is happening all the time, you just can’t see a difference because there is no net change. And your explanation about CO3 2- being more negative charged may not be true if you consider the charge distribution. The 2- charge will be distributed over all three O’s in CO3 2-, giving each a -2/3 charge. In OH-, H cannot accept some of that negative charge, so the O has a -1 charge. Thus, the O in OH- will more strongly attract a proton.</p>
<p>@lelouchFTW: buret, i think?</p>
<p>DId you guys put TTCE for Xe, HE question? I thought their average kinetic energy was same, since the temperature was same regardless of their mass…</p>
<p>What was the one where they asked for mol of z and you had like .1 and .12 m of x and y? Maybe the numbers are wrong but something like that</p>
<p>I thought it was really, really easy. Except for that tube submerged in water to find the volume of a gas. What were the answers for that? I think I put T T CE.</p>
<p>And would a 73-75 raw score be good enough for 760+? :/</p>
<p>i think it was when they had 2x + 3y → 4z, and x was .1 mol, y was .12 mol, and you’re supposed to find the mol of z. i put .16.</p>
<p>Tough, average, lenient curve? What do you guys think?</p>
<p>Do they change the curve every time based on test difficulty or will it be the same that we saw in the blue book?</p>
<p>they change the curve. i can forsee an average curve, where i think 750 equates to around a raw score of 70.</p>
<p>I got screwed over on the questions where they gave you a balanced equation and moles of reactants and asked how many would be left after it ran to completion. Can anyone explain how to do that?</p>