Jawabanmu

2014-05-30T01:30:53+07:00
M=n/v. n=m/mr n=10/40 n=0.25 M=0.25/0.08 M=3.125
2014-05-30T08:16:29+07:00
Dik : massa NaOH (terlarut) = 10gr
       mr NaOH = 40gr/mol
       massa H2O (pelarut) = 80gr
       mr H2o = 18gr/mol
Dit : fraksi mol (X) masing-masing zat ?
Peny :
i.) mol NaOH = 10gr/ 40gr/mol
                     = 0.25 mol
ii.) mol H2O = 80gr/ 18gr/mol
                  = 4.44 mol
iii.) Xterlarut = mol terlarut/ mol pelarut + mol terlarut
             = 0.25/ 4.44+0.25
             =0.25/ 4.69
             = 0.05 mol zat terlarut (NaOH)
iv.) Xpelarutt = mol pelarutt/ mol pelarut + mol terlarut
             = 4.44/ 4.44+0.25
             =4.44/ 4.69
             = 0.94 mol zat terlarut (H2O)