<p>Here are some questions from the review book I have:</p>
<p>Name the following species
a) [Ni(NH3)6]2+
b) K2[CoCl4]
c) [Co((H2O)4)Br2]Br</p>
<p>Formatting might be a little confusing without subscripts/superscripts.</p>
<p>alright...never mind...to complicated for me</p>
<p>ok, can someone work this type of problem out for me because it keeps confusing the heck out of me:</p>
<p>When the equation below is balanced and all coefficients reduced to lowest whole number terms, the coefficient for OH- is</p>
<p><em>__Li3N+</em><em>H2O--></em><em>Li+ +</em><strong>OH- +</strong>_NH3</p>
<p>a) 1
b) 2
c) 3
d) 4
e) 6</p>
<p>Just balance the equation.</p>
<p>My teacher taught us a trick for this one. Since you are making lithium hydroxide, you need 1:1 ratio between Li+ and OH-. There are three Li+'s because of Li3N; hence, there are three OH-'s.</p>
<p>Answer C.</p>
<p>If you balance the entire thing out...
1 Li3N + 3 H2O --> 3 Li+ + 3 OH- + 1 NH3</p>
<p>The answer is c) 3.</p>
<p>Balanced equation:
Li3N + 3H20 --> 3Li+ + 3OH- + NH3</p>
<p>Someone said the coordination number for complex ions is usually double the charge of the transition metal. But there are exceptions. So to simplify things, can't we just memorize the coordination numbers of 2 for 1+ cations, 6 for 2+ cations and 6 for 3+ cations? (Except for Au3+, which I believe is 4??) Or is there something wrong with this way of memorization?</p>
<p>The only thing I am worried about right now is getting free-response questions that I have no idea how to do...=(</p>
<p>^ blah same... if it's acid base like last year, i'm screwed</p>
<p>I really hope it's acid/base...that's basically all I can do.</p>
<p>What would you prefer, precocious?</p>
<p>precocious, question 1 is AlWAYS an acid/base question, and its a mandatory question</p>
<p>nope...its not alwasy an acid/base....its alwasy an equilbrium question...it could be ksp.</p>
<p>oh whoops... thats right</p>
<p>my teacher prides herself on getting the equilibrium question right each year, and this year she says its probably gonna be a simple acid/base question into a buffer system</p>
<p>my teacher says an equilibrium with gases.</p>
<p>oh with Kc, and Kp?</p>
<p>my teacher says prob not acid base because it was acid base last year and collegeboard tends not to like repeating itself... but if question #1 isn't acid base, the lab question is probably on titrations indicators and acid/base.</p>
<p>QUESTION!! do we get our calculators for ALL of the FR portion of the test? (questions 1-8) because i just had the most amazing idea of putting all the solubility rules into my calculator (for question #4)... i cannot memorize them for the life of me</p>
<p>my teacher predicted an acid/base, even though that was the problem last year...</p>
<p>so, buffers are just henderson/hasselbeck, right?</p>
<p>hmm, we've never done a Kp in class or even discussed them, but I taught myself just in case.</p>
<p>no, only calculator on the first couple problems...then descriptive/essays are non-calculator.</p>
<p>We only get calculators for the first part of the free-response (everything before the equations).</p>
<p>ew, that stinks lol... </p>
<p>i'd prefer some keq or ksp question (like the 2004), haha - i find those MUCH easier then acid/base/buffers probs (because of all the situations... strong/strong, strong/weak, weak/strong, weak/weak... how to find at half way point and all of that... arrrgh)</p>
<p>i heard no points are taken off if there is an incorrect answer</p>
<p>is this correct?</p>