May 2010 Chemistry

<p>does anyone know the answers to these questions?</p>

<ol>
<li>the energy diagram of A-B in the T/F section. was the rate raster A to B than B to A?</li>
<li>the graph of Hydrogen adding to Oxygen to form water?</li>
<li>(#8) is Al the one that acts as both acid and base?</li>
</ol>

<p>@autumnkim
1. i put the rate was faster from A to B
2. I remember I put the first graph.
3. I put Al too, but I wasn't too sure.</p>

<p>What were the answers to the lab equipment questions?
one about measuring volume of reagent in a titration
something about separating solids w/ different solubilities or something?
and another with a stop ****</p>

<p>1) Graduated cylinder
2) Fractional Distillation
3) Buret</p>

<p>wait what was the NH3 question? I might have put CE for that one...</p>

<p>Lol oops that word was censored... hopefully you guys get what i mean :)</p>

<p>@bananas
titration: buret
separate: filter thing
stop thing: buret?
at least thats what I put</p>

<p>@ autumnkim that's what I put too.</p>

<p>
[quote]
one about measuring volume of reagent in a titration
something about separating solids w/ different solubilities or something?
and another with a stop ****

[/quote]
</p>

<p>I put:</p>

<p>1) Burette
2) Fractional distillation or filter, whichever was there
3) Burette</p>

<p>and what was the answer to the one that asked for the molar volume of neon when the temp is like 150 and 130mmHg? (not so sure of the numbers)</p>

<p>I put A for that one just because the temperature and pressure weren't either both the numerator or both the denominator... if anything i just said makes sense</p>

<p>@DLim
isnt #1 False because the energy diagram does not tell us about the rate?</p>

<p>I don't think the answer was A for that one.</p>

<p>Activation energy can tell you about the rate. A reaction is slower if it has a high activation energy (Ea).</p>

<p>For the last T/F question what did you guys put?
It was something about collecting gas in tubes... H2... atmospheric pressure... along those lines</p>

<p>For the energy one, the rate was not 'faster' from a to b. Those graphs say nothing about the 'speed' of reactions. Just activation energy and exo/endo thermic.</p>

<p>However, I got that NH3 one wrong. I forgot it was a strong base. ugh. I just need a 700 lol.</p>

<p>The H2 one was false for the first one (the density of H2 was irrelevant) and True for the partial pressure part.</p>

<p>@ tackdizzle, for the pressure/temperature one I put C...</p>

<p>i put the one with 22.4x 300/273 x 150/760
think it was D?
anyone know how to do that one?</p>

<p>tackdizzle</p>

<p>i put A too. Pv/T=PV/t against standard conditions</p>

<p>
[quote]
For the last T/F question what did you guys put?
It was something about collecting gas in tubes... H2... atmospheric pressure... along those lines

[/quote]
</p>

<p>I think I put False/True.</p>

<p>@silverturtle
I put true/true.ce.
oh darn.</p>

<p>and for the energy diagram
i thought the energy diagram had nothing to do with rates
because that would mean all exothermic reactions would be faster forward?
which is false right?</p>