w około 310cm kwadratowych etanolu rozpuszczono 5g jodu. jakie jest stęzenie % otrzymanej jodyny?
Odp.
V = 310[cm3].
ms = 5[g].
d = 0,8[g/cm3].
Cp = ?
mrozp = ?
m rozp = V *d = 310[cm3]*0,8[g/cm3] = 248[g].
mr = ms + m rozp. = 5[g] +248[g] = 253[g].
Cp = (ms*100%) / mr.
Cp = (5*100%) / 253 = 500 / 253 = 1,98[%].
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Odp.
V = 310[cm3].
ms = 5[g].
d = 0,8[g/cm3].
Cp = ?
mrozp = ?
m rozp = V *d = 310[cm3]*0,8[g/cm3] = 248[g].
mr = ms + m rozp. = 5[g] +248[g] = 253[g].
Cp = (ms*100%) / mr.
Cp = (5*100%) / 253 = 500 / 253 = 1,98[%].
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