Please Help with Chemistry

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Sanchenuss · #1 Post by **Sanchenuss** » Thu Mar 13, 2008 3:25 am

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?

MusicallyInspired · #2 Post by **MusicallyInspired** » Thu Mar 13, 2008 3:31 am

You have just destroyed my brain.

Klytos · #3 Post by **Klytos** » Thu Mar 13, 2008 4:44 am

Wow. You tried looking up your textbook?

Sanchenuss · #4 Post by **Sanchenuss** » Thu Mar 13, 2008 5:06 am

yes the textbook makes no sense. I was hoping someone here was good at Chemistry :p

Klytos · #5 Post by **Klytos** » Thu Mar 13, 2008 6:33 am

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? ;)

haradan · #6 Post by **haradan** » Thu Mar 13, 2008 7:24 am

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

Brainiac · #7 Post by **Brainiac** » Thu Mar 13, 2008 6:35 pm

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.

#8 Post by **navynuke04** » Thu Mar 13, 2008 10:35 pm

And somebody lives up to their name...

Vildern · #9 Post by **Vildern** » Fri Mar 14, 2008 12:55 am

Wow... that's... like... Chinese to me...

Tsk, tsk, Brainiac... you ought not know these things...

MusicallyInspired · #10 Post by **MusicallyInspired** » Fri Mar 14, 2008 1:44 am

If he didn't then he really would just be the lover of high-in-fibre breakfast cereal.

Brainiac · #11 Post by **Brainiac** » Fri Mar 14, 2008 1:45 am

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.

Please Help with Chemistry

Please Help with Chemistry

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