Daftar Isi
Tentukan kadar urea dlm larutan urea 1 molal
1 molal = [g/Mr] x [1000/p], jangan lupa Mr urea = 60
1 = [g/60] x [1000/p]
g = 0,06p
Kadar urea = g / [g + p] x 100%
= 0,06p / [0,06p + p] x 100%
= (0,06/1,06) x 100%
= 5,66%
___selesai___
pastikan kadar urea dlm larutan urea 1 molal
Molalitas = [massa urea/Mr] x [1000/massa pelarut air]
Mr urea = 60 & Mr air = 18
1 = [g/60] x [1000/p]
g = 0,06p
Kadar urea = [massa urea] / [massa urea + massa air] x 100%
kadar urea = g / [g + p] x 100%
kadar urea = 0,06p / [0,06p + p] x 100%
kadar urea = [0,06/1,06] x 100%
menjadi, = [⁶/₁₀₆] x 100%
∴ kadar urea = 5,66%
pastikan kadar urea dlm larutan urea 1 molal
60………………..
Tentukan kadar urea dlm larutan urea 1 molal
urea 1 molal = 1 mol urea dlm 1000 gr air
>> urea = 1 mol
mol=gr/ mr jadi gr urea= mol x mr
=1 x 60
=60
>> air = 1000 gr
kadar urea = masaa urea/ masaa larutan x 100 %
= massa urea / masaa urea +massa air x 100 %
=60/ 60 +1000 x100 %
=60/1060 %
=5,66 %
tentukan kadar urea dlm larutan urea 1 molal
Molalitas = [massa urea/Mr] x [1000/massa pelarut air]
Mr urea = 60 & Mr air = 18
1 = [g/60] x [1000/p]
g = 0,06p
Kadar urea = [massa urea] / [massa urea + massa air] x 100%
kadar urea = g / [g + p] x 100%
kadar urea = 0,06p / [0,06p + p] x 100%
kadar urea = [0,06/1,06] x 100%
kadar urea = 600/106 %
∴ kadar urea = 5,66%
___selesai___
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