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Topic: volume titrate problem  (Read 10100 times)

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g5r

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volume titrate problem
« on: October 13, 2005, 05:20:48 PM »
what volume of .1M NaOH is needed to titrate 100ml of .2M H2SO4?

This is what i have so far...
     100ml H2SO4*(.1M NaOH/.2M H2SO4)= 50ml

the answer to the problem is 400ml. what am i doing wrong.
                       
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Offline mike

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Re:volume titrate problem
« Reply #1 on: October 13, 2005, 06:16:06 PM »
First you need to write the balanced equation for the reaction between sulfuric acid and sodium hydroxide.
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There is no science without fancy, and no art without facts.

Offline Albert

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Re:volume titrate problem
« Reply #2 on: October 16, 2005, 06:52:03 AM »
[H2SO4]=0.2M V=100mL

H2SO4 + 2NaOH -> Na2SO4 + 2H2O

[NaOH]=0.1M V=xmL

Now, a little bit of calculations:

(2*0.2M*0.1L) / 0.1M =0.4L=400mL
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