User:Jotomicron/Sandbox

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[edit] Signature

  1. ~~~: ~ Jotomicron 20:19, 7 October 2007 (UTC)
  2. ~~~~: ~ Jotomicron 20:19, 7 October 2007 (UTC) 20:19, 7 October 2007 (UTC)
  3. ~~~~~: 20:19, 7 October 2007 (UTC)

[edit] Ions

\textrm{H}_2\textrm{PO}_4^- : dihydrogenophosphate

\textrm{HPO}_4^{2-} : hydrogenophosphate

[edit] Formulae

\left\{\begin{matrix} \textrm{pH}=\textrm{7,2}+\log\frac{\left[\textrm{H}_2\textrm{PO}_4^-\right]}{\left[\textrm{HPO}_4^{2-}\right]} \\ \left[\textrm{H}_2\textrm{PO}_4^-\right] + \left[\textrm{HPO}_4^{2-}\right] = 0.1 \end{matrix}\right. \Leftrightarrow

\textrm{pH}_\textrm{final} = \textrm{7,2}+\log \frac {\left[\textrm{HPO}_4^{2-}\right] - [\textrm{HCl}]} {\left[\textrm{H}_2\textrm{PO}_4^-\right] + [\textrm{HCl}]}

\frac {\left[\textrm{HPO}_4^{2-}\right] - [\textrm{HCl}]} {\left[\textrm{H}_2\textrm{PO}_4^-\right] + [\textrm{HCl}]}

c=\frac{n}{V}\Leftrightarrow V=\frac{n}{c}

\frac{\Delta \textrm{pH}}{\Delta \textrm{T}}=\frac{6.8-6.9}{37-0}=-0.0027\ \textrm{K}^{-1}

\frac{\Delta \textrm{pH}}{\Delta \textrm{T}}=\frac{6.8-6.9}{37-0}=-0.0027\ \textrm{K}^{-1}