Q$1)60mL$ of $)=(1\mathrm{.}75{10}^{-5}$ was titrated with $0\mathrm{.}1$MNaOH.

a$)$ What is the $pH$ after addition of: and $75ml$ of NaOH.

b$)$ Draw an approximately titration curve.

Q$2)$ Calculate the $pH$ during the titration of $100ml$ of $0\mathrm{.}02M$ NaOH with $0\mathrm{.}05MHCl$ after addition the following volumes of $HCl,$ then draw an approximate titration curve at: $0\mathrm{.}0ml,20ml,40ml,$ and $40\mathrm{.}5ml$ of $HCl?$