<p>Hey guys! Hope your tests went well. </p>
<p>I just created this so that we could discuss the test while we wait for the scores. It's going to be a long 19 days!</p>
<p>For the question about C(graphite) → C(diamond), you have to switch the sign of the enthalpy for the second equation because the products of the first reaction have to be the reactants of the second, right?</p>
<p>Did anyone else think that it was really easy? Only one has the hydride/halide question</p>
<p>@riverseden Yeah, I reversed the enthalpy sign for the second equation.</p>
<p>I think it was easy-ish but then again I have’t taken chem since last year. I think if I’m going to lose points somewhere, it’s going to be for careless mistakes due to the time crunch.</p>
<p>I feel like a lot less people took chem this time, considering this forum only has 4-5 posts while the rest of them have a ton…</p>
<p>Yes, For the graphite question, it was something like +2…</p>
<p>And do you guys remember the last question… It was about 0.050 M Nacl in 2 liters of solution. And the question was “what is the concentration of Na in the solution?”</p>
<p>What was the halide hydride question… I remember I put hydride for it…</p>
<p>Also, for the true and false, I mostly got TF and TT, but a few TT CE… How about you guys? </p>
<p>And for the graphs in the beginning of the test… The one talking about the HCL acids and base addition was the titration graph?
And there was another graph about a reactant reaching equilibrium… Something like…The graph started on the top and levelled off in the bottom of the graph…
And yet, another graph question where it was about PV versus P or something… What was te answer to that?</p>
<p>@Sajidur4 i got similar answers to you for the most part.
for the P vs V graph, im pretty sure it looks like this: </p>
<p><a href=“http://img.sparknotes.com/figures/0/0a1c01f07d0a0e51105b2065c136cda0/ideal_p1_1.gif”>http://img.sparknotes.com/figures/0/0a1c01f07d0a0e51105b2065c136cda0/ideal_p1_1.gif</a></p>
<p>@Sajidur4, the concentration of Na in the solution was 0.025, I think I got 3-4 CE’s in total and for the graphs question, it was a normal titration curve, a graph that STARTED on the y-axis and then leveled off, and a horizontal line for the PV vs. P</p>
<p>@ninjapanda123, it was PV vs. P, NOT P vs V </p>
<p>@iheartfood ohh ok thanks for clearing that up.
and i got the same thing for the Na concentration</p>
<p>1) There was some question that asked which one is soluble in water: NH3?
2) Fluorine is diatomic
3) There was a question about what can act like an acid and a base… I put HSO4- only… </p>
<p>4) SiO2 was the network
5) highest boiling point was one with the most ions… Something like AgCl3?
Do you guys remember any other questions?</p>