[travis10]

Alright, i have one of my last finals tomaorw, its for honors chemistry and i have no clue what i am doing, these are the problems that we must turn in if we want to get a decent grade:
1. find the concentration of H3Po4, the Keq = 7.5 x 10^ -3, pH = 4.5

2. Find the Keq of a 0.300 M solution with a Ph of 6.5

3. find the molarity of a 750 ml solution that has been neutralized by 450 ml of .50 M NaOH

4. How many moles of H2SO4 are needed to neutralize 60 ml of .40 M KOH.

5. find normality of a solution with 17g of H3PO4 in 500ml of solution

6. find the number of equivilents in 45g of H2S)4.

7. Find the ion concentration of a saturated silver sulfide solution with a Ksp of 8 x 10 ^ -51.

8. Find the concentration of the sulfide ion in 1 liter of iron sulfide to which 0.04 M of iron nitrate has been added, ksp of iron sulfide = 8 x 10^ -19

9. will calcium carbonate parcipitate when 0.5 Liters of .0001 M Ca(No2)2 is mixed with 0.05 liter 0.008 M NaCO3 to make a 1 liter solution? ksp of the CaCO3 is 4.5 x 10 ^ -8.


those are the only ones i have not finished, the test is tomaorw, any and all help on these problems would be much loved, thank you very much to anyone that can help me pass with a B.  

 
 

[hmx9123]

I don't mean to be trite, but what are you doing in honors chemistry if you 'have no clue' what you are doing?  If you are to receive help in these forums, you need to show the work that you've already done.  We won't do your help for you.  You will be lucky to receive an answer in a timely manner, either, since this is a last minute post.  Show us your work.