PH larutan CH3COOH 0,1M adalah 3. Mol CH3COONa yang harus ditambahkan ke dalam 100 mL larutan CH3COO.... Question from @laniyuliLani

laniyuliLani @laniyuliLani

October 2018 1 90 Report

PH larutan CH3COOH 0,1M adalah 3. Mol CH3COONa yang harus ditambahkan ke dalam 100 mL larutan CH3COOH 0,1M larutan semula adalah ... mol

ikbalwahyu Ph CH3COOH = 3 maka $H^{+}$ = $10^{-3}$
buffer asam :
$H^{+}$ = Ka . $\frac{mol CH3COOH}{mol CH3COO ^{-} }$
$10^{-3}$ = $10^{-5}$ . $\frac{10 x^{-2} }{mol CH3COO ^{-} }$
$10^{-3}$ = $\frac{10 ^{-7} }{mol CH3COO ^{-} }$
$CH3COO^{-}$ = $\frac{ 10^{-7} }{ x^{-3} }$ = $10^{-4}$ mol
CH3COONa ⇒ $CH3COO^{-}$ + $Na^{+}$
maka CH3COONa ditambah ke CH3COOH adalah $10^{-4}$
mudah2an benar :D

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