PERHITUNGAN KADAR VITAMIN C

Data Baku

KONSENTRASI = C (bpj) ABSORBANSI (A)2,5 0,1275 0,245

7,5 0,35010 0,46515 0,672

a = 0,02364864865

b = 0,04351891892

r = 0,9997

r2 = 0,9994

pH 4,0

t = 0 menity = a + bx0,4495 = 0,02364864865 + 0,04351891892x0,4495 - 0,02364864865 = 0,04351891892xx = 9,7854C = 9,7854Log C = 0,9906

t = 10 menity = a + bx0,3385 = 0,02364864865 + 0,04351891892x0,3385 - 0,02364864865 = 0,04351891892xx = 7,2348C = 7,2348Log C = 0,8594

t = 20 menity = a + bx0,2610 = 0,02364864865 + 0,04351891892x0,2610 - 0,02364864865 = 0,04351891892xx = 5,4540C = 5,4540

Log C = 0,7367

t = 40 menity = a + bx0,2450 = 0,02364864865 + 0,04351891892x0,2450 - 0,02364864865 = 0,04351891892xx = 5,0863C = 5,0863Log C = 0,7064

pH 4,5 t = 0 menit

y = a + bx0,6400 = 0,02364864865 + 0,04351891892x0,6400 - 0,02364864865 = 0,04351891892xx = 14,1628C = 14,1628Log C = 1,1516

t = 10 menity = a + bx0,5930 = 0,02364864865 + 0,04351891892x0,5930 - 0,02364864865 = 0,04351891892xx = 13,0828C = 13,0828Log C = 1,1167

t = 20 menity = a + bx0,5305 = 0,02364864865 + 0,04351891892x0,5305 - 0,02364864865 = 0,04351891892xx = 11,6467C = 11,6467Log C = 1,0662

t = 40 menity = a + bx0,5145 = 0,02364864865 + 0,04351891892x0,5145 - 0,02364864865 = 0,04351891892xx = 11,2790C = 11,2790Log C = 1,0523

PERHITUNGAN TETAPAN LAJU PERURAIAN BERDASARKAN ORDE 1

pH = 4,0

t (menit) Log C0 0,990610 0,859420 0,736740 0,7064

a = 0,94418

b = -6,908857143.10-3

r = 0,9098015113

r2 = 0,82773879

b = −k

2,303

-6,908857143.10-3 = −k

2,303

K = 0,015911098/menit

pH = 4,5

t (menit) Log C0 1,151210 1,116720 1,066240 1,0523

a = 1,14018

b = -2,490285714.10-3

r = -0,9301573259

r2 = 0,8651926508

b = −k

2,303

-2,490285714.10-3 = −k

2,303

K = 0,05735127999/menit

pH K Log K Log K + 34,0 0,015911098 -1,798299849 1,20174,5 0,05735127999 -2,241456885 0,75855,06,0

PENIMBANGAN DAN HASIL PEMBUATAN LARUTAN DAPAR

150 ml lar. Dapar pH

direncanakan

HASIL PENIMBANGAN (gram) pH SESUNGGUHNYAAs. Sitrat NaOH Terhitung pH meter

4,0 2,46578 0,5387 3,89 4,04,5 3,2535 0,83864 4,14 4,55,06,0

pH ABSORBANSIt = 0 menit t = 10 menit t = 20 menit t = 40 menit

4,0 0,440 0,330 0,265 0,2380,450 0,347 0,257 0,252

x = 0,4495 x = 0,3385 x = 0,2610 x = 0,24504,5 0,640 0,593 0,531 0,515

0,640 0,593 0,530 0,514x = 0,640 x = 0,593 x = 0,5305 x = 0,5145

5,0

6,0

pH KADAR VITAMIN C TERHITUNG PADA PENDIAMAN :t = 0 menit t = 10 menit t = 20 menit t = 40 menit

4,0 C = 9,7854 C = 7,2348 C = 5,4540 C = 5,0863Log C = 0,9906 Log C = 0,8594 Log C = 0,7367 Log C = 0,7064

4,5 C = 14, 1628 C = 13, 0828 C = 11,6467 C = 11,2790Log C = Log C = Log C = 1,0662 Log C =1,0523

5,0 C = C = C = C =Log C = Log C = Log C = Log C =

6,0 C = C = C = C =Log C = Log C = Log C = Log C =

pH TETAPAN LAJU PERURAIAN TERHITUNG (satuan??)

4,0 0,015911098/menit4,5 0,005735127999/menit5,06,0