<p>What was the answer to the one about the definition of what a Acid is. I remeber the first two were correct but the last one said Electron Pair donor, which I think is a base. So i said I,II</p>
<p>Anyone remember?</p>
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What was the answer to the one about the definition of what a Acid is. I remeber the first two were correct but the last one said Electron Pair donor, which I think is a base. So i said I,II
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<p>Ahhh... that one. Yah I think it is I and II only. The third one is a Lewis base.</p>
<p>Guys, you have to remember Hydrogen bond doesn't simply mean the bond between Hydrogen and X element.</p>
<p>Hydrogen bonds mean the dipole moment formed from the literal hydrogen bond with X element. So in the case of Nh3 and H2O you have to remember that Nh3 gives off that lone pair as a base during solution. The N never bonds with the O.</p>
<p>However, in the case of a suspension in solution, the positive side of the H2O molecule which means the H atoms (because the O being more electronegative hogs the electrons), is attracted to the N of the NH3 (again another dipole moment b/c the N is extremely negative (hogging all electrons)). Therefore there is hydrogen bonding between Nh3 and H2O.</p>
<p>But hey, we'll see when results come out, so it's not a big deal. You might be right, and I might have learned this wrong.</p>
<p>It is def I and II for the acid definition one. about a 57-59 raw score is a 700, according to many study books. I also believe that I got over a 720, probably around a 750. Blanked 3 or 4, and got 2-5 wrong, so my raw score is at least a 75 (I think and hope :P)</p>
<p>viciouspoultry, I think I put that too...
Shifu Yoda, I'm pretty sure it was, since H2CO3 is unstable and has to decompose into gaseous form.<br>
I'm kind of scared now, since it seemed so easy, that there won't be as good of a curve, and I really hope I didn't screw up....I already have like three wrong....</p>
<p>What was the answer to the T/F question where there was a graph of a chemical reaction occurring?
The first question asked about the rate/direction of the chemical reaction, while the second part talked about the activation energy of the reaction.
I put T,T,CE but i'm NOT sure if this is right :/</p>
<p>i als puy TTCE but i am not sure either</p>
<p>Hmm, correct me if i'm wrong, (my memory is a bit hazy right now) but the graph showed an exothermic reaction. I'm pretty certain that both parts were T/T. It's the CE i'm uncertain of.
Do exothermic reactions go in the forward direction to produce more products, because the activation energy of the reverse (endothermic) reaction is higher than the activation energy of the exothermic reaction?</p>
<p>it was exothermic..i am not sure for the CE part..</p>
<p>let me ask u smth else..in the ice one what did u put??was it TF??</p>
<p>and which was the kinetic theory one??</p>
<p>I think the Ice one was T/T/CE. I can't remember the question for the kinetic theory one though. . .
Also, for one of the last MC questions, there was a chart with some data about water and u had to calculate how much energy was required to heat liquid water at 0C to 100C. Was the answer to that question 42kJ? I kinda guessed on this question.</p>
<p>I think it was 49, because you had to have 8 KJ to get it up to 100 C for the liquid plus 41 KJ to vaporize it. And I put T/T/CE for the Ice</p>
<p>It was 49 kJ</p>
<p>was it TTCE for the reaction-energy of activation one??</p>
<p>No idea. I put CE.</p>
<p>COMPILATION OF ANSWERS</p>
<p>Part A(I mention only the quite tough ones)
1.Al forms oxides which act as bases and acids..
2.we use a buret for titration
3.add NaOH to H2SO4 to get pH < 6
(there were not actually many tricky questions on part A...)</p>
<p>PartB
1.3d can have 8e- it has 4 subshells FF
2.NH3 is soluble in water and it forms hydrogen bonds with water TF (or is it TT??)
3.two acids with two diffrent Ka and then [H+] was FF
4.ice and water is TTCE (are u sure bout this one??,i thought it would be TF)
5.HCL acts as a B-L acid and has bigger molecular mass TT but NOT CE
6.in the reaction and energy of activation it was TTCE???
7.ice melts spontaneously at 10 and it releases energy i put TF ddo u agree??</p>
<p>Part C
1.Li has the biggest first ionization energy
2.CsF is the most ionic
3.1g of Ag has the least atoms
4.add 10 e- to the left to balance the equation
5.H2 is the least found in air
6.Diagram of hydrogen in the synthesis of H20 was a str8 line and then a flat one.
7.49kJ to get water from 10 to 100 gas
8.the process from solid to gas is known as sublimation
9.we get K(NO3) after areaction and then heating
10.in an reaction with Mg there was left some Mg and 2.. g of sth else
11.a I II III question it was I and for acids becuz the third was a Lewis base(electron donor)
12.a I II III question was I and II and III for strong acids..
13.CHCL2 has no isomers
14.Na 1+,Mg2+ and Al 3+ have the same electrons
15.CCL4 is not polar
16.H2O molecule is bent
add to the list but i think that since we dont remember any more they are probably easy ones</p>
<p>anyone wanna add sth??</p>