Lecture19, 2-25-08 Integrated rate laws

Lecture19, 2-25-08 Integrated rate laws - Determining Rate...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Determining Rate Laws Initial Rates Method-Differential Rates 1. Find two experiments in which all but one reactants concentration is constant. 2. Observe the relationship between concentration change and rate change of that reactant. 3. Repeat for other reactant(s). NH 4 + (aq) + NO 2 (aq) N 2 (g) + 2 H 2 O(l) 5.40 x 10-7 0.0100 0.200 3 2.70 x 10-7 0.0100 0.100 2 1.35 x 10-7 0.0050 0.100 1 Initial Rate (Ms-1 ) [NO 2 ] o [NH 4 + ] o Exp. # Determine the rate law Rate = k[NH 4 + ][NO 2- ] Practice Problem Determine the value of the rate constant. 2 NO(g) + Cl 2 (g) 2 NOCl(g) 1.45 0.20 0.20 3 0.36 0.20 0.10 2 0.18 0.10 0.10 1 Initial Rate (Mmin-1 ) [Cl 2 ] o [NO] o Exp. # Practice Determine rate law and rate constant BrO 3 (aq) + 5 Br(aq) + 6 H + (aq) 3 Br 2 (l) + 3 H 2 O(l) 3.2 x 10-3 0.20 0.10 0.10 4 0.20 0.10 0.10 [Br] o 3.2 x 10-3 0.10 0.20 3 1.6 x 10-3 0.10 0.20 2 8.0 x 10-4 0.10 0.10 1 Initial Rate (Ms-1 ) [H + ] o [BrO 3 ] o Exp. # Practice- Determine rate law and rate constant The Change of Concentration with Time aA products 1 st order y = mx + b Plot: ln[A] vs. t slope = k ] [ ] [ A k t A rate = = o t A kt A ] ln[ ] ln[ + = o t t o A A for kt A A ] [ ] [ , ] [ ] [ ln < = integrate Concentration and time of 1 st order reaction [A] t ln[A] t...
View Full Document

This note was uploaded on 08/06/2008 for the course CHEM 1B taught by Professor Watts during the Winter '08 term at UCSB.

Page1 / 27

Lecture19, 2-25-08 Integrated rate laws - Determining Rate...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online