I hate Chemistry.

[Stonecutter]

Well, I was getting a C, now I'll be happy to be passing.

anyways the point of this......

The final question on my test today I want to see if any of you can do it.

Ca(OH)2 a strong base is only slightly soluable in water. You dissolved just enough solid Ca(OH)2 in 30degree C water to form a clear solution. 100 mL of this solution was pipetted out and transfered to a 250 mL erklenmyer flask. It was titrated against .05 M (molarity) HCl solution ot the Phenolphthalein end point. The titration took 48.80 mL of the solution find the following.......

(a) a balanced chemical equation for the reaction of Ca(OH)2 and HCl <actually, that's not too hard.

(b) The molarity of the Ca(OH)2

(c) The soluablity of Ca(OH)2 in 30C water in grams of Ca(OH)2 per 100 mL of solution.
:banghead:

[BlueFire]

So this is what I'm looking forward to in Chemistry Honors...

[Ginkasa]

There went my hope that you only mix chemicals in chemistry... :unsure:

*shrugs and walks away*

[Dyne]

Take Physics. I'm sure you'll find it much more easy!

















...:sneaky:

[The Germanator]

Hmm, I took chemistry two years ago and I guess I forget everything... :unsure:

[DaBigDeezy]

ahhhhhhhh im gonna fail chemistry, i cant wait

p.s. i lived in wilmington,DE , i loved it there

[The Germanator]

Originally posted by DaBigDeezy


p.s. i lived in wilmington,DE , i loved it there

Woah? Really? That's awesome! I don't see/meet many people who have lived in, much less know where Delaware is...Not many people I know here like Delaware very much, but I think it's a very chraming little place.

P.S what school did you go to?

[gekko]

Not that hard of a problem. Completely forget everything related to Chemistry over the summer, and don't ever want to remember it.

The reason I hated chemistry was because it was all about filling in formulas, basically a second math class of all word problems.

[Jason1]

Im in Chemistry...but we havent done any formulas that advanced...or maybe we have they just have them worded differently...I really dont know.

[BreakABone]

Originally posted by gekko
Not that hard of a problem. Completely forget everything related to Chemistry over the summer, and don't ever want to remember it.

The reason I hated chemistry was because it was all about filling in formulas, basically a second math class of all word problems.

For once I semi-agree with you, I done forgoet EVERYThing I learnted in Chemistry (It was about two years ago), but Chemistry seems to be more of a Math course than science and so does Physics, I mean probably that's why I found them easier then Bio.

[manasecret]

Yeah, it's really not that hard of a problem. If you have the equation for titration it should be just filling things in.

I'm taking Chem 2 now in college, and last semester in Chem 1 we had the titration stuff. I don't remember the formula, though we had a lab on it.

[fingersman]

I hate chemistry, so I tried to forget every aspect of it.....however I do remember that organic Chemistry is harder than that question you did.


Have fun whenever you do O.C!!! :D

[Kitana85]

Wow, I was going to help you, but then I realised just how much Chem I forgot, I mean, I took honors chem sophmore year, and now I'm a senior... AP bio is enough for me

[Yoda9864]

I could probably do the problem, I'm really tired right now, so, I'll say the answer is 6.9 mL.

[Ginkasa]

Originally posted by Yoda9864
I could probably do the problem, I'm really tired right now, so, I'll say the answer is 6.9 mL.


Uh huh, you're tired. I bet ;)


*shrugs and walks away*

[Stonecutter]

Well, fortunatly the only two questions i missed on the entire test were parts B and C of that particluar question (if anyone REALLY wants to know I'll post the answer) but I did pull a 75 out of 90 overall so Im happy.

[Xantar]

Well, let's see what I can do in a three minutes rush job. This is relatively simple compared to the organic chemistry that I'm doing right now, but I did learn it a year ago.

Okay, enough covering my butt.

a) Ca(OH)2 + 2HCl ------> CaCl2 + 2(H2O)

b) 0.0244 molar (half of the number of moles of HCl you titrated in multiplied by 10 because the solution was a tenth of a liter)

c) .1808 grams per 100 mL. That's the answer to b) multiplied by the molecular weight of calcium hydroxide and divided by 10.

So, how far off am I?

Edit: Whoops. I was missing a 2 in front of the water molecule.