October 2011 - Chemistry

<p>tHERE WAS a question on LeChatelier’s Principle
Something about the concentration of CO2. I pikced that one that talked about increasing the temperature.</p>

<p>any guesses on what the curve is going to look this time?</p>

<p>Also, does anyone have any idea what the score chart is for SAT Chemistry? Like the conversion of Raw Scoring to ___/800? Thanks in advance</p>

<p>Another question, sorry
can anybody explain to me the curve of the SatSubjects? Does the curve change for the same sat test everytime. If so…why? Isn’t the same/similar test?</p>

<p>yeah i got temperature fo rthat question, questions96. lol</p>

<p>for the lechatelier’s principle… i picked the one about doubling one of the reactants and halving CO2 (since it was a product)
… unless i’m talking about a different question because i seriously can’t remember which ones were which, lol</p>

<p>What did everyone get for the question with the civet method (?)</p>

<p>What is the Civet Method.</p>

<p>For the collecting gas over water, wouldn’t it just be H2 because oxygen is more soluble in water?</p>

<p>Also for the pressure is proportional to total moles of gas because the pressure exerted by a gas is independent of other gases in the container is it TTCE?</p>

<p>I think I put TTCE for that one as well</p>

<p>…what do you mean by the civet method?</p>

<p>oxygen is more soluble than hydrogen (think of the fish), yes, but it is still far from being 100% soluble in water. I’m pretty sure oxygen is commonly collected by water displacement in labs, since the solubility is negligible.</p>

<p>oh I put TTCE for that but I’m not sure if it’s right…</p>

<p>for the sand and iron filings and K something, you use water to separate right?</p>

<p>carbon tetrachloride was the neutral nonpolar liquid with no odor</p>

<p>What was the question for the balancing equation with oxygen…</p>

<p>Chloeee, which one you are talking about? for the XO one, i put 9.0</p>

<p>Oh that wasn’t a balancing question. 9.0 the mass of element X because there were four moles of the XO.</p>

<p>ofmg I left the question blank about how you go about separating the potassium iodine from the sand/iron fillings.</p>

<p>I was so conflicted! </p>

<p>I was going to say the answer that involved water, but I ended up forgetting to answer it.</p>

<p>what were the other choices for the question about the “neutral nonpolar liquid with no odor”?</p>

<p>I omitted 15 questions. I think im going to have to retake in november!</p>