<p>There was a question about like WO3 turning into W and H2 turning into H2O but I was confused because isnt the W an oxidizing agent and the H2 a reducing agent? But both were answers so i was totally confused…</p>
<p>I think H2 was the reducing agent. I put H2 as my answer, forgot which answer H2 though.</p>
<p>Yeah, I agree with you. H2 was oxidized, and so it was the reducing agent</p>
<p>yea i put e about h2 i know I got this one right because it shows the ones w/ W were wrong because it said oxidizing agaent instead of reducing agent or something along those lines. I just know something w/ h2 was right</p>
<p>I put H2 as the reducing agent. Seemed like the safest choice since it was getting oxidized.</p>
<p>W is an unknown, so…</p>
<p>W is tungsten, not an unknown.</p>
<p>W is the element that is reduced, but the compound it was in, WO3, is the oxidizing agent.</p>
<p>H2 is the right answer.</p>
<p>Oh, lmao, didn’t realize it was Tungsten. Got lucky with that one.</p>
<p>Haha neither did I. Don’t think it really mattered. Just had to find the oxidization numbers and see where the electrons go.</p>
<p>Hmm. Overall, this test was pretty tricky ( I think I made some silly mistakes). Why exactly is WO3 not an oxidizing agent? And I thought that the answer choice with H2 said “H2 is reduced”, not “H2 is the reducing agent”.</p>
<p>H2 lost electrons I think. Meaning it was oxidized or was the reducing agent. There was no answer for H2 was oxidized.</p>
<p>aite so weve gone over most of the questions i hadd trouble with anything else guys.</p>
<p>Dunno.</p>
<p>None of the balancing equations had charges that needed to be balanced right? I just hope I didn’t misread anything. </p>
<p>There was one where the temperature changed from 27 C to 47 C…but I’m not sure which way it changed. I said pressure decreased from 3.4 atm to 3.2 atm’s.</p>
<p>For the simple math/balancing stuff,</p>
<p>Question of hydrogen ion concentration with pH=6 was 10x-6.
The equation with sulfur ended up having a 16 coefficient in front of sulfur.</p>
<p>Don’t remember much else - rushed through all the stoichiometry stuff.</p>
<p>Edit: Remeber feeling unsure about alot of the first section, especially TTCE. Anyone remember questions from that section?</p>
<p>what was the one with the test tube turned around? i put ttce but i think thats totally wrong.</p>
<p>also i know this is probably realy easy but i dont know how to do it with volumes:</p>
<p>what was the one that had a=like 2so2+o2=2so3 and it said 40 ml, 20 ml? i put 40 i think thats wrong?</p>
<p>for the true-false section, i got like 3 ttces?</p>
<p>one of them was for ideal gasses that i got a ttce</p>
<p>btw, was number 115 on that tf? chlorine does not have less electronegativty than carbon right?</p>
<p>i think that one was 3.0 i remember one question was 3 i think it mighta been the atm one</p>
<p>k ill try to remember as many t/f ones as i can.<br>
there was one about NaCl having more ionic character than AlCl3, that was true, but the second part, that alcl3 was a nonmetal, was false. </p>
<p>another one was… helium atoms are faster at the same temperature as some other gas, which was TTCE, the explanation was that the particles weighed less. </p>
<p>another one was… Ch4 has a lower boiling point than water , which is true, but the second part is false, because the explanation is that Ch4 has greater intermolecular hydrogen bonding (which is false)</p>
<p>another one was a F/T, i don’t remember the first part, but the second part was that the volume is proportional to temp for an ideal gas</p>
<p>Sugar creates a lower freezing point than NaCl, because colligative properties are determined by individual solute particles. F/T</p>
<p>I think that the eudiometer one (with the test tube turned around) was F/T. The second part is definetely true, but it would be counter-intuitive to measure the volume after the gas pressure = atmospheric pressure. Then it’s measuring an entirely different volume of gas!</p>
<p>for the ttce water in a tube one, i think it was ttce. because if the pressure outside does not equal the pressure inside, how the heck are you going to measure the pressure inside?</p>
<p>Haha, thanks, that makes me feel better.</p>
<p>Schoolisboring, I also put TTCE for the eudiometer, but I’m not sure.</p>
<p>The 20ml/40ml thing was stoichiometry with volumes I think.</p>
<p>And chlorine is more electronegative than carbon.</p>
<p>wait nacl has more ionic character than alcl3? crap i suck…i thought alcl3 did because it has a higher lattice energy.</p>
<p>huh the ionic gas one was TT? the first part was that in an ionic gas, all molecules move at the same speed…i thought since they have the same temp, they move at the same speed?</p>
<p>no way, the second part is definitely not treue because you do not account for water vapor pressure because of this the pressure of the gas can’t be equal to outside pressure. Also the first part is true because you read the volume at when the pressures are equal. Think about pv/t if p was variable thered be no way to accurately read measurments. The reason it works is u lower or raise the euidometer to even out the water levels. This changes the volume accordingly.</p>