A 250ml standard solution of HCl needs to be prepared for a titration. Calc the required volume of 5.0M HCl

Question

required for the standard solution so that 15ml aliquots from the standard solution contain 0.0036 moles of HCl.

Answer 1

find moles in 250 mls:

250 ml @ 0.0036 moles / 15 ml = 0.06 moles of HCl

find the volume of 5.0 molar that has 0.06 moles:

0.06 moles @ 5.0 moles / litre = 0.12 litres of concentrate

your answer is: use 12  ml of 5.0 Molar HCl