Showing work on AP Chem exam

Test Preparation AP Sciences
1

<p>I'm aware that you need to show work on the exam, but do you need to do the whole dimensional analysis thing? Or can you just put down the condensed version? Ex:
Converting grams to moles:
3 grams of Hydrogen. 1 gram= 1 mole; 3x1=3 mol H
Does this count just as much as doing the more formal D.A. crossing out and whatnot?</p>

<p>I personally abhor the 'railroad track' technique (I find it annoying, unnecessarily confusing, and tedious), so in class I always just use basic logic, like if I have .1 mol of HCL and it is in a 1:2 mole ratio with the product, AgCl or something, I multiply .1 by 2 to find the moles of AgCl. Is this acceptable on the exam? Or do I need to follow the crossing out of stuff?</p>

2

<p>Show at least some work that is essential to show what is actually going on in your head. There is a specific guideline, I believe, in rewarding points in the steps and the correct answer is worth like 1 extra point for that problem. The railroad track conversion method is useful in my opinion so you don’t actually mess up on your math and see that everything cancels out successfully.</p>

3

<p>I would recommend heading to AP Central and going through the sample ones from the past years. However, you should try to show as much work as possible. Be careful you don’t spend too much time though.</p>