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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: rraj411 on October 12, 2013, 07:06:06 PM

Title: pH
Post by: rraj411 on October 12, 2013, 07:06:06 PM

When 200 ml of 0.1 M of Hcl is mixed with 0.2M H2so4 and this solution is neutralized by 500ml of 0.1M of NaOH. Then find the original pH and find how much volume of NaOHof 0.1 M should be added for complete neutralization?

Title: Re: pH
Post by: billnotgatez on October 12, 2013, 08:04:05 PM

you must show your attemps at solving this
please read forum rules

Title: Re: pH
Post by: rraj411 on October 13, 2013, 01:31:38 AM

Quote from: rraj411 on October 12, 2013, 07:06:06 PM

When 200 ml of 0.1 M of Hcl is mixed with 0.2M H2so4 and this solution is neutralized by 500ml of 0.1M of NaOH. Then find the original pH and find how much volume of NaOHof 0.1 M should be added for complete neutralization?

I tried the problem by taking the number of moles for each of the acid then added them up to get 7/20 moles then I found that the NaOH has lesser OH than H+ in the solutions. So it has to be acidic but the Final answer is not matching  ???

Title: Re: pH
Post by: Borek on October 13, 2013, 03:14:11 AM

Hard to check anything as you gave no volume of the sulfuric acid.

Have you remembered that sulfuric acid is diprotic?