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x=46/92/(46/92+117/78)
x=1/2/(1/2+3/2)
x=1/2/4/2
x=1/4
xtoluena=1/4
Mr toulena (C7H8) = 92 (silahkan cari)
gr benzena (zat pelarut) = 117 gram
Mr benzena (C6H6) = 78
dit : fraksimol zat terlarut (Xt) ...?
jwb :
Xt = mol terlarut/ mol terlarut + mol pelarut
= gr/mr toulena / gr/mr toulena + gr/mr benzena
= 46/92 / 46/92 + 117/78
=0,5 / 0,5 + 1,5 (cek hasilnya)
= 0,5 / 2
= 0,25 (silahkan cek hasilnya)
semoga paham, jika ingin bertanya silahkan komentar