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Pertanyaan

pH suatu larutan basa lemah MOH 0,1 M adalah 10. Tetapan basa MOH adalah ... M.space

  1. 10 to the power of negative sign 9 end exponent 

  2. 10 to the power of negative sign 7 end exponent 

  3. 10 to the power of negative sign 4 end exponent 

  4. 10 to the power of negative sign 3 end exponent 

  5. 10 to the power of negative sign 2 end exponent 

B. Rohmawati

Master Teacher

Mahasiswa/Alumni Universitas Negeri Semarang

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B.

Pembahasan

Dari nilai pH, dapat diketahui nilai pOH dan konsentrasi ion hidroksida.

table attributes columnalign right center left columnspacing 0px end attributes row pOH equals cell 14 minus sign pH end cell row blank equals cell 14 minus sign 10 end cell row blank equals cell 4 space space space space space space space space space space space yields open square brackets O H to the power of minus sign close square brackets equals 10 to the power of negative sign 4 end exponent space M end cell end table 

Untuk basa lemah

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 square root of K subscript a cross times M end root end cell row cell 10 to the power of negative sign 4 end exponent end cell equals cell square root of K subscript a cross times 10 to the power of negative sign 1 end exponent end root end cell row cell left parenthesis 10 to the power of negative sign 4 end exponent right parenthesis squared end cell equals cell left parenthesis square root of K subscript a cross times 10 to the power of negative sign 1 end exponent end root right parenthesis squared space 10 to the power of negative sign 8 end exponent equals K subscript a cross times 10 to the power of negative sign 1 end exponent end cell row cell K subscript a end cell equals cell 10 to the power of negative sign 8 end exponent over 10 to the power of negative sign 1 end exponent end cell row cell K subscript a end cell equals cell 10 to the power of negative sign 7 end exponent end cell end table  


Jadi, jawaban yang tepat adalah B.

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