Konstruksi Persamaan Laju Dr. Sci. Muhammad Zakir Department of Chemistry Hasanuddin University
Time Table
Konstruksi/disain persamaan laju RANAH TEORETIK RANAH EKSPERIMEN
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.
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
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
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
WHAT NEXT ?
RANAH EKSPERIMEN = k [G]m [A]n SENIOR HIGH SCHOOL BASIC CHEMISTRY EXPERIMENT PHYSICAL CHEMISTRY EXPERIMENT HOMEWORK (BC AND PC) !
Metode eksperimen Metode Diferensial Metode Integral Metode Isolasi
Metode diferensial
Chemical Kinetics, K. J. Laidler, 1965, pp. 15-16, McGraw-Hill, Inc.
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)
original
Metode integral
Quiz !