Pertanyaan

Jika larutan hci (K, NH 1,8 x 10) mempunyai pH - 5, di dalam 200 mL larutan tersebut terlarut NH CI sebab M, NH,CI 53,5)

1,9 gram
3,8 gram
5,3 gram yak . . . .
19,0 gram
38,0 gram

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Master Teacher

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Pembahasan

$italic p H equals 3 comma space italic m italic a italic k italic a left square bracket H plus right square bracket equals 10 to the power of negative sign 5 end exponent italic M open square brackets H to the power of plus sign close square brackets equals square root of Kw over Kb cross times open square brackets G close square brackets end root left square bracket H to the power of plus sign right square bracket squared equals Kw over Kb cross times open square brackets G close square brackets left square bracket italic G right square bracket equals left parenthesis left square bracket H to the power of plus sign right square bracket squared italic cross times K italic b right parenthesis forward slash K italic w equals fraction numerator left parenthesis 10 to the power of negative sign 5 end exponent right parenthesis squared cross times 1 comma 8 cross times 10 to the power of negative sign 5 end exponent over denominator 10 to the power of negative sign 14 end exponent end fraction equals 1 comma 8 cross times 10 to the power of negative sign 1 end exponent equals 0 comma 18 space italic M italic M equals gr over Mr cross times fraction numerator 1000 over denominator V open parentheses mL close parentheses end fraction italic g italic r equals fraction numerator italic M italic cross times italic M italic r italic cross times V left parenthesis italic m italic L right parenthesis over denominator 1000 end fraction equals left parenthesis 0 comma 18 space italic M italic cross times 53 comma 5 cross times 200 italic m italic L right parenthesis forward slash left parenthesis 1000 space italic m italic L forward slash italic L right parenthesis equals 1 comma 9 space italic g italic r$

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