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Sebanyak 100 mL Ca(OH)2 0,02 M memiliki harga pH larutan sebesar ....

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Sebanyak 100 mL Ca(OH)2 0,02 M memiliki harga pH larutan sebesar ....

  1. 2 minus space log space 4

  2. 2 plus space log space 4

  3. 12 minus sign space log space 4

  4. 12 plus space log space 2

  5. 12 plus space log space 4

S. Lubis

Master Teacher

Jawaban terverifikasi

Pembahasan

Ca left parenthesis O H right parenthesis subscript 2 merupakan basa kuat yang memiliki valensi = 2

Maka dapat menggunakan persamaan :

open square brackets O H to the power of minus sign close square brackets space equals space Mb space x space valensi

table attributes columnalign right center left columnspacing 0px end attributes row cell left square bracket O H – right square bracket space end cell equals cell space M subscript b a s a end subscript space x space v a l e n s i space b a s a space space space space space space space space space space space space end cell row blank equals cell space 0 comma 02 space M space x space 2 space space space space space space space space space space space space end cell row blank equals cell space 0 comma 04 space M end cell row blank blank blank row cell p O H space end cell equals cell space – space log space left square bracket O H – right square bracket space space space space space space space space space space end cell row blank equals cell space – space log space 0 comma 04 space space space space space space space space space space end cell row blank equals cell space 2 space – space log space 4 end cell row blank blank blank row cell space p H space end cell equals cell space 14 space – space p O H space space space space space space space end cell row blank equals cell space 14 space – space left parenthesis 2 space – space log space 4 right parenthesis space space space space space space space end cell row blank equals cell space 12 space plus space log space 4 end cell end table

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