<p>Ignition: when you say "this is true," you mean that the statement "a weak acid cannot be used to titrate a strong base" is true, right?</p>
<p>Anyone know the answer to the I, II, III, IV question? (The following processes are endothermic.) I chose I, II, and IV, but that's probably wrong.</p>
<p>Also, I love how the answers included extra info in the choices so that it made the problems easier. </p>
<p>Example: Which of the following is linear? A) Blah blah, which is non-polar.</p>
<p>my answers in random order</p>
<ol>
<li><p>filtration</p></li>
<li><p>I got could be NH3 as the titration base</p></li>
<li><p>150 for the vapo pressure of the gas w/ the diagram</p></li>
<li><p>Ice floats on water -> T, T, CE</p></li>
<li><p>got like 49 for K in on question/might have gotten 4.</p></li>
</ol>
<p>Ignition: when you say "this is true," you mean that the statement "a weak acid cannot be used to titrate a strong base" is true, right?</p>
<p>Hmmm, well, we just used HCL to find the Kb of NH4 in my science class in school, so I'm assuming that it would be possible to find the molarity of an unknown strong base using a weak acid in a reserse manner.</p>
<p>The true false about carbonic acid in a titration of a strong base was true for the first part, false for the second I believe, though I do not remember what the second statement was.</p>
<p>"got like 49 for K in on question/might have gotten 4."</p>
<p>I think I got the 4.9 answer, because I originally got the 49 answer, but realised that was wrong when looking at the fraction. (Can't exactly remember how, but pretty sure 49 was incorrect)</p>
<p>sweet thanxs </p>
<p>what was the answer to the moleclue that was linear? was it XeF4?</p>
<p>ice has less dense than water therefore it floats on the water so it is TT CE</p>
<p>49 was correct. </p>
<p>It was (.7)^2 / (.1)^2</p>
<p>Or .49 / .01 = 49</p>
<p>"the second statement was like "ice's orientation is more open and less dense...."
how can the molecular orientation of a solid be more "open" than the orientation of a liquid??
so i said T F..."</p>
<p>Water is unique from almost all other solids in this manner. Air gets trapped when forming the crystals, thus its density is less than water. It's one of those things you just had to know :</p>
<p>"what was the answer to the moleclue that was linear? was it XeF4?"</p>
<p>Thats what I got, I was thrown for a few seconds because I knew noble gases only react under extreme circumstances, but I narrowed it down to be the only choice that was possible (The other molecule in the formation XY2 had an unbonded electron pair, thus it was bent/angular"</p>
<p>"It was (.7)^2 / (.1)^2"</p>
<p>IIRC there was no coefficient before the .1M compound, but I could be wrong</p>
<p>more answers...</p>
<ol>
<li>H2CO3 and HCO3- as bronstead-lowry acids/base</li>
<li>i used vapor pressure twice in the matching for questions 5-9 or something like that</li>
<li>got like 2 atm for teh problem that used PV/t = pv/t</li>
<li>got alkali metals for a question</li>
<li>got HX for the CX4 and used CL- as X</li>
</ol>
<p>How can Xe F4 be linear? That makes no sense, it already has at least four bonds. Also its possible to titrate a strong base with a weak acid, it doesn't matter if its strong or not, its the concentration and amount added that counts.</p>
<p>what was the answer to the manometer (150mm of pressure or somehting), the biggest consituent on the sun (i put helium but i think its hydrogen and am upset), the ones with the volitile liquids in the beginning (vapor pressure, boiling point), the biggest place of error (with the +/- things for like mass of water, deltaH), the uncharachteristic trait, and the titration graph where the base is 13 whihc orginally made me think it had to be a strong base (duh) but then i looked at the concentrations and thought it was something like ammonia (a weak base)? thanks</p>
<p>eh</p>
<ol>
<li>H2CO3 and HCO3- as bronstead-lowry acids/base (Conjugate acid/base pair, this is what I got also)</li>
<li>i used vapor pressure twice in the matching for questions 5-9 or something like that (Cant remember exactly, but i used one of them twice, it was probably this)</li>
<li>got like 2 atm for teh problem that used PV/t = pv/t (Is also what I got)</li>
<li>got alkali metals for a question (Amazing I think I remember this problem, and got the answer also...(Lowest ionization energy group I think))</li>
<li>got HX for the CX4 and used CL- as X (I think I also got this)</li>
</ol>
<p>biggest error was change in temp i think it was 5 +- .5</p>
<p>XeF4 is linear b/c it has 2 bonding pairs making it either bent or linear
the force vectors of teh lone pairs cancel making it linear</p>
<p>tbry - The choice was XeF2... Thus it is very linear.</p>
<p>my bad i thought i had typed XeF2 but apparently i didnt...and i kinda didnt know how to change it...but i figured i could edit it...but im kinda lazy so...</p>
<p>ne way more answres</p>
<ol>
<li>i got distilled water was not a good conductor of electricity (not cure if right)</li>
<li>Mn had the most unparied e-</li>
<li>got redox rxn for the Mn+2 + Cu --> Mn + Cu+2 (something like that)</li>
<li>what was teh hydrolysis rxn? was that the one where they used water?</li>
<li>got something like X(1.8)Y(.9)Z(3.6) so X2YZ4 (X, Y, and Z are some elements)</li>
</ol>
<p>" i got distilled water was not a good conductor of electricity (not cure if right)" I got this also</p>
<p>"Mn had the most unparied e-" I got Cu because Cu violates the Aufbau Principle
"got redox rxn for the Mn+2 + Cu --> Mn + Cu+2 (something like that)" I dont remember the answer, but it was +5 electrons on one of the sides (Answer D, whatever that was)
"what was teh hydrolysis rxn? was that the one where they used water?" Dont remember</p>
<p>"got something like X(1.8)Y(.9)Z(3.6) so X2YZ4 (X, Y, and Z are some elements)"
X2YZ4 is right</p>
<p>I got Mn as most unpaired e also..</p>
<p>i just looked it up.. distilled water is NOT a conductor of electicity... shoot i got this wrong</p>