<p>beer's is easy. A= absorbance, a= absorbtivity (specific for the ion) b (specific for couvette size, and c is concetnration. Some years they dont even give it to you on the sheet because it isnt on the test. its too easy to be on the test,</p>
<p>splelling erorss....</p>
<p>oh ok, that was pretty easy.
Thanks.</p>
<p>can somebody please explain me this question</p>
<p>In the laboratory, H2(g) can be produced by adding which of the following to 1M HCl (aq)?
I. 1M NH3 (aq)
II. Zn(s)
III. NaHCO3(s)</p>
<p>(a) I only
(b) II only
(c) III only
(d) I and II only
(e) I, II, and III</p>
<p>thanks in advance</p>
<p>LOL, go to the 2003 Form B exam. "Chemistry" is spelled wrong.</p>
<p>And speaking of the 2003 Form B exam, does someone know how to do #2, part B, problem (ii)?</p>
<p>
[quote]
In the laboratory, H2(g) can be produced by adding which of the following to 1M HCl (aq)?
I. 1M NH3 (aq)
II. Zn(s)
III. NaHCO3(s)</p>
<p>(a) I only
(b) II only
(c) III only
(d) I and II only
(e) I, II, and III</p>
<p>thanks in advance
[/quote]
</p>
<p>B is the answer. Metals react with HCl in a redox reaction where the metal oxidizes and the hydrogen ion reduces to hydrogen gas.</p>
<p>NH3 doesn't work, it's just acid base with no redox (hydrogen gets donated to ammonia).</p>
<p>Sodium bicarbonate/baking soda doesn't work because once again it's just an acid base reaction with a hydrogen being donated to HCO3, forming carbon dioxide and water.</p>
<p>you're welcome.</p>
<p>
[quote]
LOL, go to the 2003 Form B exam. "Chemistry" is spelled wrong.</p>
<p>And speaking of the 2003 Form B exam, does someone know how to do #2, part B, problem (ii)?
[/quote]
</p>
<p>what was the answer</p>
<p>they don't give the answers for pre-2004 exams.</p>
<p>
[quote]
they don't give the answers for pre-2004 exams.
[/quote]
</p>
<p>Ah thought you were talking about the free response.</p>
<p>what's the difference between Q and ksp?</p>
<p>i hope the curve is super low since its a different format.......</p>
<p>
[quote]
Ah thought you were talking about the free response.
[/quote]
</p>
<p>I was. let's see if this is 10 characters long</p>
<p>hey everyone! i am so excited for tomorrow</p>
<p>the answers for exams before 2004 can be foundm, but you have to look for them</p>
<p>lol^^ 10 chars</p>
<p>
[quote]
I was. let's see if this is 10 characters long
[/quote]
</p>
<p>Q is the reaction quotient. if Q > K the reaction will proceed. if Q < K, the reaction will not proceed.</p>
<p>Q is the reaction quotient, it determines which way the reaction will proceed. Ksp is the solubility constant and only takes the products into consideration because the reactant will be a solid (therefore, the concentration does not change).</p>
<p>I don't understand how they can't not tell how the reaction part will be graded... I wonder what would happen if everyone just bombed the test</p>
<p>also if Q > Ksp a precipitate forms</p>
<p>check out 2006 #1 d part two for applying Q</p>
<p>don't you use the same equation to calculate Q and ksp?</p>
<p>my teacher has a gut feeling that an acid-base BUFFER and a kinetics questions will be on the test tomorrow :(</p>