An Erlenmeyer flask contains an unknown amount of HCl This s

An Erlenmeyer flask contains an unknown amount of HCl. This solution was titrated with 0.125 M NaOH. The process consumed 35.55 of NaOH to complete the reaction. Calculate the number of moles of HCl.

Solution

number of moles of NaOH = M(NaoH)*V(NaOH)
= 0.125 M * 35.55 mL
= 4.44 mmol
= 4.44*10^-3 mol

The reaction taking place is:
NaOH + HCl —> NaCl + H2O

so,
moles of HCl reacted = number of moles of NaOH reacted
= 4.44*10^-3 mol

Answer: 4.44*10^-3 mol