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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: jmjengland on May 28, 2019, 10:19:01 AM

Title: calculation of volume
Post by: jmjengland on May 28, 2019, 10:19:01 AM

Dear All,

I would like to ask for help with this challenge please.

Calculate volume of 20% NaOH which is needed to increase pH of NaCl from 2 to 7 with volume of NaCl 60 cubic meter.

Thank you for any help.

Title: Re: calculation of volume
Post by: Borek on May 28, 2019, 10:33:20 AM

Quote from: jmjengland on May 28, 2019, 10:19:01 AM

increase pH of NaCl from 2 to 7

NaCl solutions don't have pH around 2. If the pH is 2, solution contains also something else. No way to answer the question without knowing what.

Please note you have to show your attempts at solving the problem to receive help, this is a forum policy.

Title: Re: calculation of volume
Post by: jmjengland on May 28, 2019, 11:43:55 AM

Yes you are right. NaCl solution contains HCl.
HCl so