June 2009 - Chemistry

<p>

Correct.</p>

<p>10char</p>

<p>Jhockey,</p>

<p>I think that was the only one NOT found in nature as a free element.</p>

<p>I’m sorry guys. I’m wrong I’m just so nervous… it is 3
Can somebody please confirm the lab question
and some of the balancing questions</p>

<p>

At only 7 pages, at least skim the thread.</p>

<p>tl;dr YOU’RE WRONG.</p>

<p>The answer was pouring “acid into water” - which is correct procedure
it didn’t say “water into acid” (incorrect)</p>

<p>so the only correct one was the graduated cylinder</p>

<p>So can someone answer what was the answer for adding 30 ml of .1 M KOH to a 60 ml unknown monoprotic acid?
i put .05 M… that was kinda a guess, i wasn’t sure if i needed to know if the acid was weak or strong.</p>

<p>ya I put Na…</p>

<p>try adding water into acid :smiley: remember to call an ambulance beforehand, haha</p>

<p>What was the answer to the ion balancing question?</p>

<p>I’m still confused about the potassium and water, do they yield OH- or OH- and H2?</p>

<p>1 wrong
0 blank</p>

<p>Anyways, what did you guys get for the 02 and 03 question? It was close to the end of the exam.</p>

<p>I omitted the ion balancing equation because I didn’t want to waste time.</p>

<p>allotropes</p>

<p>O2 and O3 are allotropes.</p>

<p>the one with K and H2O was H2 gas, K+ and OH-
The answer was H2 and OH- since K+ wasn’t an answer.</p>

<p>Carbon and Graphite have the same structures (false) because they are both pure forms of carbon (true)</p>

<p>does anyone remember question referring to spectators where they gave 4 choices. I think I put the 2nd and 4th choice which was Cl and Na or something like that.</p>

<p>1st and 4th, and that’s the answer I got. :]</p>

<p>Sublimation is not a chemical reaction.</p>

<p>As far as I know, anyway.</p>

<p>yes it was Na and Cl for the spectator ions (1st and 4th)</p>

<p>Can someone answer what was the answer for adding 30 ml of .1 M KOH to a 60 ml unknown monoprotic acid?
i put .05 M… that was kinda a guess, i wasn’t sure if i needed to know if the acid was weak or strong.</p>

<p>for the koh one i think it was .05 M because its m1v1=m2v2</p>

<p>Anybody have the answer to the ionic balancing question?
Was it 2? I don’t even remember lol</p>