Tekanan Osmosis

(A)   Molaritas larutan

\begin{equation*}
\begin{split}
M & = \frac{n}{V}  \\\\
M & = \frac{\dfrac{9,75}{78}}{1}  \\\\
M & = 0,125 \text{ M}
\end{split}
\end{equation*}

(B)   Tekanan osmosis larutan

\begin{equation*}
\begin{split}
\pi & = M \: R \: T  \\\\
\pi & = 0,125\cdot 0,082\cdot (273 + 127)  \\\\
\pi & = 4,1\text{ atm}
\end{split}
\end{equation*}