Topic: Calculate Initial pH, pH at midpoint and pH at equivalence point (Read 8202 times)

tpowell · « **on:** July 09, 2011, 06:43:27 PM »

A 50.00 mL of 0.172 M HNO3 was titrated with 0.206 M NaOH. Determine pH of the solution at the following point during the titration. - Recall that HNO3 is a strong acid, and ionizes completely. Thus, the pH calculations during the titration are simpler than those for a weak acid like acetic acid. -

Volume of base needed to reach the Equivalence Point    mL
Volume of base needed to reach the mid-point to the Eq. Pt.    mL
pH before addition of the base
pH at the midway point
pH at the equivalence point

The volume of base needed to reach equivalence point and midpoint are 41.75mL and 20.87mL respectively, and the initial pH is 0.764. I'm having trouble figuring out how to calculate the pH at the midpoint and at the equivalence point though. Any ideas? Thanks!

enahs · « **Reply #1 on:** July 09, 2011, 11:08:50 PM »

http://www.titrations.info/

Topic: Calculate Initial pH, pH at midpoint and pH at equivalence point (Read 8202 times)

tpowell

Calculate Initial pH, pH at midpoint and pH at equivalence point

enahs

Re: Calculate Initial pH, pH at midpoint and pH at equivalence point

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