All categories - 26 September 2007

4469.6 g of 10% H2SO4 mixed with 1047 g of 45% KOH and 70 L of water (total volume is ~75L), should give a pH of around 2.....however in real life I get a pH of around 1.5-1.6....what is going on here?

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4469.6 grams of 10% H2SO4 mixed with 1047 grams of 45% KOH and 70 L of water (so total volume is ~75L), calculated should give a pH of around 2.....however in real life I get a pH of around 1.5-1.6....what is going on here????
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The calculations are:

4469.6 grams of 10% H2SO4 = 446.95 g/98g per mole = 4.561 moles of H2SO4, 2 protons per mole = 9.122 moles of H+

1047 grams of 45% KOH = 471.15g/56 g per mole = 8.41 moles of OH-



9.122 – 8.41 = 0.712 moles of protons present

à Final volume of solution is around 75L

0.712/75 = 0.00949 moles of H+ present (per litre)

pH = -log[H+]

pH = 2.02



sure a small difference would occur between theory and the real world, but please, this is a pH calcuation

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Thank You!!

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5. Ban Military Recruiters from College Campuses where are tax dollars are going..

So why don't you admit that you want people of GOD to be tolerant of immorality, indecency and hedonism..Say it like it is and don't backslide this is what you want isn't it?

Jesus would tell these people to repent and sin no more, if they did not they would have a permanent home in the lake of fire why should we be any different in what we think?

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~~**Spread smiles**~~ :-)

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