Calculate the change in pH when $0\mathrm{.}284mol{H}^{+}$is added to $1\mathrm{.}00L$ of each of the following buffers.

$1$st attempt

Part $1(1$ point$)$

See Periodic Table

See Hint

If the final $pH$ is lower than the initial, your answer should be a negative number.

a $0\mathrm{.}560M$ solution of pyridine $($py$)$ containing $0\mathrm{.}460Mpy{H}^{+}$

change in $pH=$

Part $2(1$ point$)$

If the final $pH$ is lower than the initial, your answer should be a negative number.

a $0\mathrm{.}620M$ solution of aniline $($an$)$ containing $0\mathrm{.}900Man{H}^{+}$

change in $pH=$