lapres acidi

LEMBAR PERHITUNGAN REAGEN

NaOH ( BM NaOH = 40 gr/mol )
N = M x Valensi
M = gramBM x 1000ml
0,1 = gram40 x 1000250
gram =1g gramBM x 1000ml
HCl 37 % ( ρ =1,19 gr/ml)
N = M x Valensi
M = 10 . . %BM
M = 10 . 1,19 . 37%36,5
M =12.06 M 10 . . %BM
V1.M1 = V2.M2
12,06 . V = 0,15.250
= 3,11ml












LEMBAR PERHITUNGAN KADAR

Standarisasi NaOH dengan H2C2O4 0,1 N
V yang dibutuhkan= 9,4 mL
N NaOH= V x NH2C2O4V NaOH
N NaOH= 10mL x 0,1N9,4 mL
= 0,1063 N

Standarisasi HCl dengan NaOH yang telah distandarisasi
V yang dibutuhkan= 13,7 mL
NHCl= V x NNaOHV HCl
N NaOH= 10mL x 0,1063N13,7 mL
= 0,1477 N

Mencari Kadar NaHCO3 atau Na2CO3
Sample 1
Volume ke PP =7,6 mL (x)
Volume ke MO = 21,3 mL(y)
Kadar Na2CO3=2x ×N HCl × BM Na2CO32 × 100010 ppm
Kadar Na2CO3=2×7,6 ×0,1477 × 1062 × 100010 ppm
Kadar Na2CO3 =11.189,87 ppm211×7,6 ×0,1477pm
Kadar NaHCO3=(y-x) ×N HCl × BM NaHCO3 × 100010 ppm
Kadar NaHCO3=13,7×0,1477 × 84 × 100010 ppm
Kadar NaHCO3=16.997,36 ppm
Sample 2
Volume ke PP = 8,2 mL (x)
Volume ke MO = 20 mL(y)
Kadar Na2CO3=2x ×N HCl × BM Na2CO32 × 100010 ppm
Kadar Na2CO3=2×8,2 ×0,1477 × 1062 × 100010 ppm
Kadar Na2CO3=12.838,08 ppm211×7,6 ×0,1477 × 1062 × 100010 ppm
Kadar NaHCO3=(y-x) ×N HCl × BM NaHCO3 × 100010 ppm
Kadar NaHCO3=11,8×0,1477 × 84 × 100010 ppm
Kadar NaHCO3=14.640,024 ppm
%Eror sampel 1
Na2CO3= 16200-11.189,8716200 × 100%
Na2CO3= 30,9%30,9%16200-11.189,8716200 × 100%
Kadar NaHCO3=14600-16.997,31614600 × 100%
r NaHCO3=16,4%14600-16.997,31614600 × 100%
%Eror sampel 2
Na2CO3= 15800-12.838,0815800 × 100%
Na2CO3= 8,74%30,9%16200-11.189,8716200 × 100%
Kadar NaHCO3=13800-14.640,02413800 × 100%
r NaHCO3=6%14600-16.997,31614600 × 100%
Rata-rata = 18,01%

Mencari Kadar Asam Askorbat dalam Sari Cabe
V yang dibutuhkan 0,4 mL
NAsam= VxN NaOHVSampel x f pengenceran
NAsam= 0,4x0,1063 NaOH10 x 10
NAsam=0,04252 N

Mencari Kadar Asam Asetat dalam Yakult
V yang dibutuhkan 0,3 mL
NAsam= VxN NaOHVSampel x f pengenceran
NAsam= 0,3x0,1063 NaOH10 x 10
NAsam=0,03189 N




ACIDIA ooooooooooooooooooiACIDI-ALKALIMETRI


Laboratorium dasar teknik kimia 1 B-1