<p>do you all do these?</p>
<p>i just finished chapter 3's maration problem</p>
<p>well, marathon problems won't be necessary at all for the ap exam.</p>
<p>yeah... they are tough butmy teacher takes them as extra credit</p>
<p>holy crap, you're already on chap 3?? we haven't even received our books yet :(</p>
<p>this is zumdahls'...</p>
<p>we're actually almost done with chapter 4... but... we are reviewing chapter 3.</p>
<p>we don't really have tests... just a nin week test each nine weeks which is half our grade... which is quite nice.</p>
<p>... other than that... yeah...</p>
<p>we're going to rush through gas laws.</p>
<p>keep in mind, like half the book is review // easy stuff.</p>
<p>but... we are on the 4th week out of 18 weeks. so.... almost 1/4 done with the semester. :D</p>
<p>How is AP Chem so far???????????????</p>
<p>HAHA I loved Marathon problems!</p>
<p>Wait till you get to the one about Star Trek... its so funny.</p>
<p>:)</p>
<p>And they're not necessary, per se, for AP Chem. None of the problems on the AP test will be that complicated (multi-step, time consuming) of a problem. But, the Marathon problem usually incorporates many different concepts (even from other chapters) into the same problem and really builds your chem problem solving skills. It's a good practice set for the AP in that way.</p>
<p>I'm in Oregon and our schools are so poor that we start September 12. We do have summer assignments though... I love the Star Trek problem in Zumdahl's! ha ha ha...trekkies... (Enterprise sucks though... Star Trek Voyager was the best...I mean, they had a single mission: to get home...anyway...)</p>
<p>does anyone have the answer to chapter 4's answer?</p>
<p>i can't find it on the internet</p>
<p>Three Students were asked to find the identity of the metal in a particular sulfate salt. They dissolved a 0.1472-g sample of the salt in water adn treated it with excess barium chloride, resulting in the precipitation of barium sulfate. After teh precipitate had been filtered and dried, it weighed 0.2327 g.
Each student analyzed the data independently and came to different conclusions.
The conclusions were that the metal is sodium, titanium or gallium. What further tests you suggest to determine which student is most likely correct.</p>
<p>that is the question</p>