Kerjain dengan carany ya ntar kasih +++ 1. Berapa gr gula harus di tambahkan lagi ke dalam 600gr larutan gula 15% , agar diperoleh larutan gula 40% ? 2. Tentukan molaritas asam nitrat 6,3% yang massa jenisnya 1,3gr/ml ! 3. Berapa gram MgCl2 terdapat dalam 380ml larutan MgCl2 0,4M! Ar dari Mg=24 Cl=35,5 H=1 N=14 O=16
shaunreed
1. 15%=mol gula/mol total x100% 15%=(600/180)/mol total x 100% 0,15=5/mol total mol total=500/15 40%=mol gula/(500/15) x 100% 0,4=mol gula/(500/15) 200/15=mol gula 200/15= massa/180 massa=2400 2400-600=1800g
2.
3. M=n/V 0,4=n/0,38 n=0,152mol
massa= n.Mr massa=0,152 x 95 massa=14,44g
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rizkyritonga
15%=mol gula/mol total x100% 15%=(600/180)/mol total x 100% 0,15=5/mol total mol total=500/15 40%=mol gula/(500/15) x 100% 0,4=mol gula/(500/15) 200/15=mol gula 200/15= massa/180 massa=2400 2400-600=1800g
15%=mol gula/mol total x100%
15%=(600/180)/mol total x 100%
0,15=5/mol total
mol total=500/15
40%=mol gula/(500/15) x 100%
0,4=mol gula/(500/15)
200/15=mol gula
200/15= massa/180
massa=2400
2400-600=1800g
2.
3.
M=n/V
0,4=n/0,38
n=0,152mol
massa= n.Mr
massa=0,152 x 95
massa=14,44g
15%=(600/180)/mol total x 100%
0,15=5/mol total
mol total=500/15
40%=mol gula/(500/15) x 100%
0,4=mol gula/(500/15)
200/15=mol gula
200/15= massa/180
massa=2400
2400-600=1800g