Konstruksi Persamaan Laju

Presentasi berjudul: "Konstruksi Persamaan Laju"— Transcript presentasi:

1 Konstruksi Persamaan Laju
Dr. Sci. Muhammad Zakir Department of Chemistry Hasanuddin University

2 Time Table

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5 Konstruksi/disain persamaan laju
RANAH TEORETIK RANAH EKSPERIMEN

6 RANAH TEORI k G + A  GA TULISKAN APA YANG ANDA LAKUKAN
MISALNYA SDR. MENCAMPUR GARAM (CELLA, SATO) DENGAN AIR QUESTIONS : BERAPA LAJUNYA ? ORDE REAKSINYA ? KONSTANTA LAJUNYA ? KONSTRUKSI PERSAMAAN REAKSI: k G + A  GA CHEMICAL FORMULA IS NOT IMPORTANT, WE ARE ONLY DEALING WITH NUMBER, AMOUNT, CONCENTRATION, etc.

7 RANAH TEORI  MEMBUAT MODEL
k A + B  P Rate (laju, velocity):  = - d[A]/dt = -d[B]/dt = + d[P]/dt Rate equation = Rate law (persamaan/hukum laju)  = k [A]m [B]n dimana k = konstanta laju reaksi, m = orde reaksi terhadap A, n = orde reaksi terhadap B

8 RANAH TEORI  MEMBUAT MODEL
Rate equation = Rate law (persamaan/hukum laju)  = k [A]m [B]n bisa juga dituliskan dalam bentuk : (???) - d[A]/dt = k [A]m [B]n - d[B]/dt = k [A]m [B]n + d[P]/dt = k [A]m [B]n

9 RANAH TEORI  MEMBUAT MODEL
k G + A  GA  = -d[G]/dt = -d[A]/dt = +d[GA]/dt  = k [G]m [A]n -d[G]/dt = k [G]m [A]n -d[A]/dt = k [G]m [A]n +d[GA]/dt = k [G]m [A]n

10 WHAT NEXT ?

11 RANAH EKSPERIMEN  = k [G]m [A]n SENIOR HIGH SCHOOL BASIC CHEMISTRY EXPERIMENT PHYSICAL CHEMISTRY EXPERIMENT HOMEWORK (BC AND PC) !

12 Metode eksperimen Metode Diferensial Metode Integral Metode Isolasi

13 Metode diferensial

14 Chemical Kinetics, K. J. Laidler, 1965, pp. 15-16, McGraw-Hill, Inc.

15 and that permits direct calculation of the rate as d[Product]/dt.
Initial rates method is based on an accurate analysis of one product at a very early stage of reaction. During that interval, the reactant concentration have changed but slightly, and that permits direct calculation of the rate as d[Product]/dt. Chemical Kinetics and Reaction Mechanisms, J. H. Espenson p.7, 1981, McGraw-Hill, Inc. (Ct – Co) Initial rate = (t – to)

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17 original

18 Metode integral

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21 Quiz !

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