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Well guys i suck hard at chemistry atm. Cant understand one shit from my teacher so i was wondering if anyone would like to help me with this titration questions

KMnO4 -concentration 0.02 mol/dm^3 -F1 standard solution of KMnO4
FeSO4.nH2O -28.0 g/dm^3 -F2
1 molar solution of H2SO4

1)Determine the number of moles of KMnO4 in 15cm^3 of F1
Using the mole ratio 5 Fe^2+ : 1 KMnO4 and your answer in a) to determine the
b)no. of moles of Fe^2+ in 25cm^3 of FeSO4.nH2O
c)Using your answer in b) to determine the concentration in mol/dm3 of FeSO4.nH2O in F2
d)determine the molar mass of FeSO4.nH2O
E)determine the value of n in FeSO4.nH2O

Srry if this looks kinda confusing. Any kind of help appreciated ^^.

-POOF-

the # of moles is over 9000

.AWAKE. wrote:the # of moles is over 9000

Eh serious answers plox .

I could help you after I'm done with my chemistry homework lolz
I'll try to get to you fast.

find the moles of KMnO4 by multiplying concentration (mol/dm^3) by the volume (cm^3), after converting the volumes to same units:
0.02 mol/dm^3 * 15cm^3 * 1/1000 dm^3/cm^3 = (well you do work, i dont have calculator)
The 1/1000 is to convert dm^3 (1 liter) to cm^3 (mililiters), or you can leave it as cm^3 because 1 dm = 10 cm, and since the unit is cubed, you have 1dm^3=10^3 cm^3=1000

Don't feel like doing the rest of the work but the idea is the same, find your conversion factors then cancel out your units until you get what you want.

Waves sexy wand @ OP

I'd answer it too, but I can't help you format and answer in one day, the universe may implode.

SM-Count wrote:Waves sexy wand @ OP

I'd answer it too, but I can't help you format and answer in one day, the universe may implode.

no go ahead, you have the universes permission, just spoke to him..

i can answer some of the questions(it's kind of hard for me because this is in english and i'm romanian,so the format of the exercises are not quite the same),
but just by pure curiosity,in what grade are you?

omg, i study chemistry and OMG... if you think this shit is hard? wait 'till you see what i have to learn, this is so f*cking easy i'm not even gonna try and bother to answer this, do it yourself, use your formulas and your BRAIN! xD

this makes my brain say: Auuw!!

Yea i figured it out you can lock topic now.
I was practically doing chemistry on my own for a year since my teacher can't teach for shit. Honestly she practically effed everyone in my whole class for a whole year LOL.

Btw awesome SM i can actually read it now xP.