<p>copper (II) is green in flame test, right?</p>
<p>i know it’s blue in solution</p>
<p>well copper is green when its oxidized so i would say yes to a green flame test</p>
<p>I have a question, can we use the quadratic program in my TI89 clac to solve the equilibrium questions? my baron’s book said if i choose to use that program, i just need to write down that i use that program to calculate my answer. is it true?</p>
<p>Copper is blue-green in flame test. Its not an important FLAME TEST though, being that the color is ambiguous. It is an important colored ion in solution though, Cu+2 is blue and Cu+1 is green in solution. </p>
<p>And I am using the solver in the TI89 for the eq. problems on the free response. So what, my answer will just be extra precise.</p>
<p>Barrons is typically harder than other books in almost any standardized tests. I would actually recommend PR over Barrons. More accurate and explanations are more thorough. But at this point, it doesn’t really matter. The test is tomorrow. How do you guys feel?</p>
<p>Join the chat room apchem.</p>
<p>you can use calc to solve equilibrium problems, as long as you put all work down and set up problem.</p>
<p>what about nuclear chemistry? Will that be in the test? My teacher says like only 2 MC…</p>
<p>And what about integrated rate laws? They will only come up on the FRQ with calculator right? Because I plugged the formulas and units of K into my calculator for that…</p>
<p>I think that electrochemical cell will be a question.
for the lab q, I predict coffee cup calorimetry.</p>
<p>Does anyone know if we need to know Gravimetry? Because I never learned that junk because our teacher gave us a lab about it over winter holidays and never mentioned it again.</p>
<p>hey, what would a lab free response look like/ask about? i havent seen one before, and im terrible with lab questions, so i dont want to completely bomb a whole free response tomorrow. thanks</p>
<p>google it from a past test. A few years back there was an infamous question requiring the knowledge of operating a spec-20 and making a liquid with a certain absorbance or somthing. I would google a few examples</p>
<p>a classic one is where they give you a bunch of materials and ask you to design an experiment, what data you need to collect, calculations and errors that could occur.</p>
<p>That infamous spectophotometry question was from 2004. Shudder. We tried that in our AP Chem class today, and it was absolutely absurd. On another note, we looked at the equation writing FR section for the first time today, and I can’t figure out what the heck the graders want. Does anyone have any advice for that question or know if writing the entire equation will get us points?</p>
<p>yeah, what kind of sentence are we going to have to write after the equation?</p>
<p>what do you mean what do they want? theres nothing complicated abt the equations</p>
<p>its a really simple question like what type of reaction is going on or what is getting reduced.
just hope that we dont get an organic chem one because theyll ask for the type and then were screwed.</p>
<p>what? All there is to the equation section is “write the reactants and the products, balance, and eliminate the spectator ions. This is called a balanced net ionic equation.” then just answer the question asked below it. It can be anything. They might say, identify the precipitate, or draw the lewis structure of the lewis base in the reaction.</p>
<p>ya thats what im worried about. They may say “methenoic acid is dissolved in a NaCl solution” or something like that. Im gonna have trouble with that.</p>
<p>I don’t have the examples with me, but the equations I got were technically right, but different than what the AP graders came up with. Spectators that had no change in phase were included.</p>
<p>Although it did say “You need not balance.”</p>
<p>those are the old ones…this year you need to balance and you lose points if you leave the spectator ions, they’ll only accept net ionic eqs</p>