250ml of 0.1M HCl is titrated against 0.2M KOH. After 5ml of KOH was used up the rest neutralization was carried out with 0.02M .NaOH what was the volume of NaOH used?

Answer 1

how many moles HCl available?
how many moles KOH was used?
each mole of KOH neutralized 1 mole of HCl
Now, knowing how many moles of HCl are left, it will take that many moles of NaOH,
so convert that to ml of .02M NaOH.

Answer 2

Answer