hey can nebody help me with my chemistry hmwk? i dun really get it... :confused: thanks!

For each of the following reactions, determine what the products of each reaction will be. When you have predicted the products, balance the equation and use a table of solubility products to determine which of the products (if any) will precipitate. Assume all reactions take place in water.

3) NaC2H3O2 + H2SO4 -->





4) Cu(OH)2 + H3PO4 -->





6) Zn + H2CO3 -->







For each of the following questions, classify the reaction type (synthesis, decomposition, combustion, single replacement, double replacement, or other) and predict the balanced chemical equation. Provide a word equation as well.



6. Sulfuric acid is neutralized by aqueous sodium hydroxide.






9. Propane burns in air.






10. Na2CO3(aq) + HCl(aq) --> NaCl(aq) + CO2(g) + H2O(l)







Indicate which of the following double displacement reactions will go to completion, and circle what the product of the reaction will be (if any). You may want to consult a list of Ksp values to solve these problems.



1)NaOH + CaBr2 -->



Will this reaction occur? ____



2)Pb(NO3)2 + HCl -->



Will this reaction occur? ____



3)Na2CO3 + KF -->



Will this reaction occur? ____



4)AgNO3 + CuSO4 -->



Will this reaction occur? ____



5)AgF + NiCl2 -->



Will this reaction occur? ____

Reaction type is pretty straight forward, there are key things to look for.
Anything dealing with propane or a gas will most likely be a combustion reaction. Another way to know is that a combustion reaction will result in the production of C20 and H2O.
Decompositon is when you have a compound produces two more substances.
Oka, Here's a simple way to remember:

Formation(synthesis/composition)
E + E --> C
Element + element --> compound
i.e.. 2Na + Cl2 --> 2NaCl
So you'll have a product which is a combination of the two reactants.

Decomposition Reaction
C --> E + E
Pretty much a reverse of the above.
i.e.. 2HgO --> 2Hg + O2

Combustion (think of 'burn')
Hydrocarbon + O2(g) --> CO2(g) + H2O(g)
The O2(g) --> CO2(g) + H2O(g) will always remain the same, never change, in these reactions.

Single and Double Replacement are really simple and straight forward.
Single Replacement
E + C --> new E + new C
So i.e..
Cu(s) + ZnO(s) --> CuO(s) + Zn(s)
You swap the Cu and the Zn, you do this because they are both 'positive'

Double Replacement
C + C --> newC + newC
i.e.. NaCl(s) + KBr(s) --> NaBr + KCl
You can swap either the positives or the negatives that are before the arrow.
In this case the two positives are swapped again. Na and K to form the two new compounds.

So when you look at a question, write out what you know, figure out what you need to know and what needs to be formed.

Na2CO3(aq) + HCl(aq) --> NaCl(aq) + CO2(g) + H2O(l)
Aqueous sodium carbonate + aqueous hydrochloric acid --> sodium chloride + carbon dioxide + water
You have compound+compound --> compound + element + element
Think about it...

Once you learn the types of reactions everything will come easier.
Like you asked what about
Zn + H2CO3 -->
You have an element + compound
So you're going to have a single replacement reaction occurring, right?
You need a new element and a new compound to be formed.
Think you can figure it out?

I know this isn't much help but I hope it gave you a start. If you're confused about anything let me know.
This is a great site to help you out, so check it out if in doubt okay.
http://www.chemtutor.com/react.htm

Good luck.

Thanks for the site.. I will look over it :)

How do I find a tutor? Therez no results.. lol

You want to find a tutor?

Yea.. I want to find one on that site... but that's OK.. and thanks for your help

All right, good luck. There are some good sites with tutors, but I don't know the names right now.