<p>Hey guys, just though I'd kill some time studying for the APs by asking a few question about the scoring of the AP Chem frq, because I believe it'll benefit all of us taking the exam tomorrow. So anyway:</p>
<p>1) Are net ionic equations given 1 point simply for balancing any equation we write down, even a wrong equation? This is what my teacher informed me. </p>
<p>2) If I wrote 18.75 when the correct answers in sig figs is 19, will I get marked down? And if so, will they continually mark me down for every step in a problem, like if i put 29.65 for part 3 in the same problem when the answer is 30?</p>
<p>3) How pumped are you guys for the APs?( doesn't have to be Chemistry if you guys already took it or sumthin). </p>
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<p>1.) Yep, as long as it makes sense.</p>
<p>2.) Nope - sig figs are only within 1 digit +/-. By that logic, 18.8 and 20 would be okay, but not 18.75. Also, I believe sig fig is it’s own point - you only lose it once per problem/part.</p>
<p>3.) I’m feeling the pressure. I’m going to be so happy when they’re over!</p>
<p>1) ^ what would you consider something that makes sense? Wouldn’t using any of the reactant to make any random product be okay?
2) Sig figs are within +/- 1 sig figs.
3) Bring them. Maybe in a few months more please =/.</p>
<p>What I meant was that it should make sense in regards to the problem.</p>
<p>Let’s say I’ve got an ionic salt and excess Sodium Hydroxide, but I don’t know about coordination complex equations. I mistakenly work it as a double replacement reaction, but balance it correctly. I believe you get the point for balancing (and reactants).</p>
<p>O i see! good to know! Do you know if we would get partial credit if we used an incorrect equation at the beginning of an electrochem problem ( like mistaking a half reaction as reduction instead of oxidation)?</p>
<p>I believe you couldn’t save points here… just remember:</p>
<p>I saw a RED CAT! - REDuction takes place at the CAThode.</p>
<p>I also saw AN OX! - OXidation takes place at the ANode.</p>