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Hitunglah konsentrasi ion  dari larutan HBr 0,1 M ...

Hitunglah konsentrasi ion left parenthesis straight H to the power of plus right parenthesis space dan space OH to the power of minus dari larutan HBr 0,1 M dengan begin mathsize 14px style K subscript a equals 4 cross times 10 to the power of negative sign 9 end exponent end style !

Jawaban:

Reaksi:

H Br yields H to the power of plus sign and Br to the power of minus sign

Hitung nilai left square bracket straight H to the power of plus right square bracket:

left square bracket straight H to the power of plus right square bracket equals square root of straight K subscript straight a cross times left square bracket HBr right square bracket end root left square bracket straight H to the power of plus right square bracket equals square root of 4 cross times 10 to the power of negative 9 end exponent cross times 0 comma 1 space M end root left square bracket straight H to the power of plus right square bracket equals square root of 4 cross times 10 to the power of negative 10 end exponent end root left square bracket straight H to the power of plus right square bracket equals space 2 cross times 10 to the power of negative 5 end exponent space straight M

Hitung nilai left square bracket OH to the power of minus right square bracket:

left square bracket OH to the power of minus right square bracket equals fraction numerator Kw over denominator left square bracket straight H to the power of plus right square bracket end fraction left square bracket OH to the power of minus right square bracket equals fraction numerator 10 to the power of negative 14 end exponent over denominator 2 cross times 10 to the power of negative 5 end exponent end fraction left square bracket OH to the power of minus right square bracket equals 5 cross times 10 to the power of negative 10 end exponent space straight M

Jadi, dapat disimpulkan bahwa konsentrasi ion bold left square bracket bold H to the power of bold plus bold right square bracket bold space bold dan bold space bold left square bracket bold OH to the power of bold minus bold right square bracket dari larutan HBr berturut-turut adalah  bold 2 bold cross times bold 10 to the power of bold minus bold 5 end exponent bold space bold M dan bold 5 bold cross times bold 10 to the power of bold minus bold 10 bold space end exponent bold M.

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