A 50 mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M HCl. What is the initial pH?

1 Answer
anor277
Aug 22, 2016

#pH=13.3#

Explanation:

It is well known that in aqueous solution, that

#pH + pOH=14#

#pH=14-pOH#

#pOH=-log_(10)[HO^-]=-log_10(0.200)# #=# #0.70#

#14-0.70=13.3#

#pH# should reasonably be high inasmuch as we measured it BEFORE the start of the titration. Given this, the information regarding the acid was a distractor. What will the #pH# be when the #50.0*mL# volume of #HCl# is added?

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