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Hitunglah pH larutan asam/basa berikut : c.  Laru...

Hitunglah pH larutan asam/basa berikut :

c.  Larutan begin mathsize 14px style Ca open parentheses O H close parentheses subscript 2 space 0 comma 005 space M end style

Jawaban:

Larutan begin mathsize 14px style Ca open parentheses O H close parentheses subscript 2 space 0 comma 005 space M end style merupakan basa kuat bervalensi 2, karena saat diionisasikan Ca open parentheses O H close parentheses subscript 2 spaceakan menghasilkan 2 ion O H to the power of minus sign

Ca open parentheses O H close parentheses subscript 2 yields Ca to the power of 2 plus sign and 2 O H to the power of minus sign

Perhitungan pH larutan Ca open parentheses O H close parentheses subscript 2 spacedilakukan dengan beberapa tahap:

  • Menghitung open square brackets O H to the power of minus sign close square brackets

table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell valensi space basa cross times M end cell row blank equals cell 2 cross times 0 comma 005 space M end cell row blank equals cell 0 comma 01 end cell row blank equals cell 1 cross times 10 to the power of negative sign 2 end exponent end cell end table

  • Menghitung pOH

table attributes columnalign right center left columnspacing 0px end attributes row pOH equals cell negative sign log open square brackets O H to the power of minus sign close square brackets end cell row blank equals cell negative sign log space left parenthesis 1 cross times 10 to the power of negative sign 2 end exponent right parenthesis end cell row blank equals 2 row blank blank blank end table

  • Menghitung pH

table attributes columnalign right center left columnspacing 0px end attributes row cell pH and pOH end cell equals 14 row pH equals cell 14 minus sign pOH end cell row pH equals cell 14 minus sign 2 end cell row pH equals 12 end table

Jadi, pH larutan begin mathsize 14px style Ca open parentheses O H close parentheses subscript 2 space 0 comma 005 space M end style adalah 12.

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