Roboguru

pH normal dari darah manusia berada pada rentang 7...

pH normal dari darah manusia berada pada rentang 7 + log2,24 sampai 7 + log2,82. Hitunglah konsentrasi ion begin mathsize 14px style H subscript 3 O to the power of plus sign end style dan begin mathsize 14px style O H to the power of minus sign end styledalam darah manusia yang memiliki pH 7 + log2,82.

Jawaban:

Diketahui pH darah manusia adalahbegin mathsize 14px style space 7 plus log 2 comma 82 end style; sehingga nilai begin mathsize 14px style P O H space menjadi space 14 minus sign left parenthesis 7 plus log 2 comma 82 right parenthesis equals 7 minus sign log 2 comma 82 end style. Konsentrasi ion begin mathsize 14px style O H to the power of minus sign end style dapat diperoleh dengan melakukan antilog pada kedua bagian kanan dan kiri rumus POH.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell negative sign log space open square brackets O H to the power of minus sign close square brackets end cell equals pOH row cell negative sign log space open square brackets O H to the power of minus sign close square brackets end cell equals cell 7 minus sign log space 2 comma 82 end cell row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell 2 comma 82 space x space 10 to the power of negative sign 7 end exponent space M end cell end table end style 

Selanjutnya, dapat diperoleh konsentrasi ion begin mathsize 14px style H to the power of plus sign end style dengan rumus di bawah ini.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell K subscript w end cell equals cell open square brackets H to the power of plus sign close square brackets open square brackets O H to the power of minus sign close square brackets space end cell row cell open square brackets H to the power of plus sign close square brackets end cell equals cell K subscript w forward slash open square brackets O H to the power of minus sign close square brackets end cell row blank equals cell left parenthesis 1 cross times 10 to the power of negative sign 14 end exponent right parenthesis forward slash left parenthesis 2 comma 82 cross times 10 to the power of negative sign 7 end exponent right parenthesis end cell row blank equals cell space 3 comma 5 cross times 10 to the power of negative sign 8 end exponent space M end cell end table end style

Jadi, konsentrasi begin mathsize 14px style H to the power of plus sign end style dan begin mathsize 14px style O H to the power of minus sign end style berturut-turut adalah begin mathsize 14px style 3 comma 5 cross times 10 to the power of negative sign 8 end exponent space M space dan space 2 comma 82 cross times 10 to the power of negative sign 7 end exponent space M end style.

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