Thursday, August 10, 2017

pH of a weak base calculation


Calculate the $\ce{pH}$ of a $100$ $\ce{mL}$ solution containing $0$$.0375$ moles of the weak base, Sodium Benzoate, $\ce{C6H5COONa}$.



$$\ce{C6H5COO + H2O -> C6H6COO- + OH-}$$



$$\frac{0.0375 ~\mathrm{mol}}{.100~ \mathrm{L}} = 0.375~M$$ $$\ce{pOH} = 0.43$$ $$\ce{pH} = 13.57$$


Is this right? Thank you.




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