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11 Maret 2025 14:34

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Bintang Z

11 Maret 2025 14:34

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Berapa PH campuran dari 0,1 M CH3COOH 500 ml dengan 0,1 M NaOH 500ml

Berapa PH campuran dari 0,1 M CH3COOH 500 ml dengan 0,1 M NaOH 500ml

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Olivia T

13 Maret 2025 13:23

<p>Hai kak, izin menjawab yaaa</p><p>&nbsp;</p><p>mol CH<sub>3</sub>CHOOH = 0,1 M . 500 ml = 50 mmol</p><p>mol NaOH = 0,1 M . 500 ml = 50 mmol</p><p>&nbsp; &nbsp; &nbsp; &nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<strong>CH<sub>3</sub>COOH &nbsp; + &nbsp; &nbsp;NaOH &nbsp; &nbsp; &nbsp; &nbsp; ——&gt; &nbsp; &nbsp; &nbsp; CH<sub>3</sub>COONa &nbsp; + &nbsp; &nbsp; H<sub>2</sub>O</strong></p><p><strong>&nbsp; &nbsp;m = &nbsp; 50 mmol &nbsp; &nbsp; &nbsp; &nbsp;50 mmol</strong></p><p><strong>&nbsp; &nbsp; r &nbsp;= &nbsp; 50 mmol &nbsp; &nbsp; &nbsp; &nbsp; 50 mmol</strong></p><p><strong>&nbsp; &nbsp; &nbsp; ------------------------------------------------------------------------- +</strong></p><p><strong>&nbsp; &nbsp; s &nbsp;= &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; - &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;- &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 50 mmol &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;50 mmol</strong></p><p>&nbsp;</p><p>M<sub>CH3COOH </sub>= mol / volume</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = &nbsp;50/500</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 0,1 mmol&nbsp;</p><p>Karena garam yang terbentuk adalah CH<sub>3 </sub>COONa yang tersusun dari asam lemah dan basa kuat, maka, gunakan rumus hidrolisis parsial basa.</p><p>&nbsp;</p><p>OH<sup>- </sup>= √Kw/Kb . M , n</p><p><sub>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</sub>= √10<sup>-14</sup>/10<sup>-5&nbsp;</sup> . 0,1 . 1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; = &nbsp; √10<sup>-10</sup></p><p>&nbsp; &nbsp; &nbsp; &nbsp; = 10<sup>-5</sup></p><p>pOH = 5</p><p>pH = 14 -5&nbsp;</p><p><strong>pH = 9 &nbsp; &nbsp; &nbsp;</strong> &nbsp; &nbsp; &nbsp; &nbsp;</p><p>&nbsp;</p>

Hai kak, izin menjawab yaaa

 

mol CH3CHOOH = 0,1 M . 500 ml = 50 mmol

mol NaOH = 0,1 M . 500 ml = 50 mmol

       

          CH3COOH   +    NaOH         ——>       CH3COONa   +     H2O

   m =   50 mmol        50 mmol

    r  =   50 mmol         50 mmol

      ------------------------------------------------------------------------- +

    s  =           -                        -                                 50 mmol              50 mmol

 

MCH3COOH = mol / volume

                    =  50/500

                    = 0,1 mmol 

Karena garam yang terbentuk adalah CH3 COONa yang tersusun dari asam lemah dan basa kuat, maka, gunakan rumus hidrolisis parsial basa.

 

OH- = √Kw/Kb . M , n

           = √10-14/10-5  . 0,1 . 1

        =   √10-10

        = 10-5

pOH = 5

pH = 14 -5 

pH = 9              

 


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