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Please Help with Chemistry
Posted: Thu Mar 13, 2008 3:25 am
by Sanchenuss
It would be awesome if a smart person or two could help me with these questions. Pleaseeeee!
1. How many grams are there in 1 eq of Ca(2+)?
2. What are products of following reaction : CaCl2 + Na2CO3------->?
3. If 25 g of salt solution leaves 50 mg of dry salt what is percent of concentration (w/w) of the salt in solution?
4. To obtain solute for 500 g of 5.00% (w/w) solution of sugar, how many grams should you weigh out?
5. What is equilibrium law for following equilibrium
H2O + CO2 -----> <--------- H2CO2?
6. The pH Solution where [H+] = 8.9 x 10(-14) mol/L is?
Posted: Thu Mar 13, 2008 3:31 am
by MusicallyInspired
You have just destroyed my brain.
Posted: Thu Mar 13, 2008 4:44 am
by Klytos
Wow. You tried looking up your textbook?
Posted: Thu Mar 13, 2008 5:06 am
by Sanchenuss
yes the textbook makes no sense. I was hoping someone here was good at Chemistry :p
Posted: Thu Mar 13, 2008 6:33 am
by Klytos
So, you wanted us to help you cheat so you didn't have to learn something, and pass your class by actually knowing the material? ;)
Posted: Thu Mar 13, 2008 7:24 am
by haradan
Geez, you know this is a GAMING community, right? I know you posted it in the off-topic forum, but asking about chemistry here is not off topic, is off reason. :p
Enter the Brain
Posted: Thu Mar 13, 2008 6:35 pm
by Brainiac
I can help. But I don't know why you need to know these. I'm not going to do your homework for you, after all.
Some starting points:
1. An equivalent (eq) is how much of a substance will react with a mole of electrons.
2. Always look at the name of the compounds in use; usually, this tells you what parts break up.
3. You have the amount of solute and the amount of solution; you need to figure out the amount of solvent. This is pure math.
4. This is the same as question 3, except for this one you have solvent mass and solution concentration and need solute mass. Again, just math.
5. First of all, that equation is not balanced; you need to fix that.
6. Remember that pH is is an inverse base 10 logarithmic system.
Posted: Thu Mar 13, 2008 10:35 pm
by navynuke04
And somebody lives up to their name...
Posted: Fri Mar 14, 2008 12:55 am
by Vildern
Wow... that's... like... Chinese to me...
Tsk, tsk, Brainiac... you ought not know these things...
Posted: Fri Mar 14, 2008 1:44 am
by MusicallyInspired
If he didn't then he really would just be the lover of high-in-fibre breakfast cereal.
Knowledge
Posted: Fri Mar 14, 2008 1:45 am
by Brainiac
Vildern wrote:Tsk, tsk, Brainiac... you ought not know these things...
You mean I should know these things or I shouldn't know these things? If the former, I do - I'm just not going to give the guy the answers outright. If the latter, why not? Granted, it's been a few years since I took chemistry and my major was more bio than chem, but I still have a pretty good memory of the stuff.
navynuke04 wrote:And somebody lives up to their name...
I do try.
MusicallyInspired wrote:If he didn't then he really would just be the lover of high-in-fibre breakfast cereal.
...I'll deal with you later.
