omg help! chemistry help!!11

hey man, the first one you did was wrong sorry. the equation is:
NaOH + H3PO4 -> NaH2PO4 + H20
now using the details of H3PO4
conc: 0.2 0.22
vol: 250/1000
moles: =0.22*(250/1000) (therefore, as its a 1:1 reaction, theres the same number of moles of NaOH)

now to work out the volume, you use the equation volume = moles/volume

so [0.22*(250/1000)] 0.2
will give you 0.275dm^-3, then just multiply by 1000 to get the answer in cm^-3

hope thats any help, i think its right. do you want the others done? they follow the same kinda pattern, but they seem slightly easier. well question 2 does.

fuck you all, especially manker :D

the answer to the next question (with the part a) and b) ) is:

a : 0.015 M
b: 0.09 M

again, these are the answers im getting just. if you want the working out just ask.

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Originally Posted by cpt_azad

fuck you all, especially manker :D

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Break his arm with a punch captain asda.

It's the only sensible coarse.

Quote:

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Originally Posted by cpt_azad

fuck you all, especially manker :D

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Even the ones who tried to help.

See, this is why my arse evaluation wasn't contradicted.

Quote:

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Originally Posted by manker

Quote:

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Originally Posted by cpt_azad

fuck you all, especially manker :D

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Even the ones who tried to help.

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Even the wrong ones :blink:

Quote:

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Originally Posted by JPaul

Quote:

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Originally Posted by manker

Even the ones who tried to help.

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Even the wrong ones :blink:

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:unsure:

All i would do would pour measured amounts of a neutraliser to the solution, then test the pH with a universal indicator then rite down the amount that was used on a table 4 even more quantafiable results use a colouromiter

Quote:

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Originally Posted by loadedet

All i would do would pour measured amounts of a neutraliser to the solution, then test the pH with a universal indicator then rite down the amount that was used on a table 4 even more quantafiable results use a colouromiter

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Are you not better off just usinig a continuum tramfunctioner. :unsure:

Quote:

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Originally Posted by exo_body

hey man, the first one you did was wrong sorry. the equation is:
NaOH + H3PO4 -> NaH2PO4 + H20
now using the details of H3PO4
conc: 0.2 0.22
vol: 250/1000
moles: =0.22*(250/1000) (therefore, as its a 1:1 reaction, theres the same number of moles of NaOH)

now to work out the volume, you use the equation volume = moles/volume

so [0.22*(250/1000)] 0.2
will give you 0.275dm^-3, then just multiply by 1000 to get the answer in cm^-3

hope thats any help, i think its right. do you want the others done? they follow the same kinda pattern, but they seem slightly easier. well question 2 does.

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thanks dude, i took my test today and i figured it out, i didnt' realize someone actually posted the answer, once again thanks for taking the time to help a guy out i owe you one. at least theres some good ppl in this forum.

@manker, jesus man just STFU will ya?