5 week plan Each week you will have 2 single lessons and 1 double lesson. In those lessons you will learn aspects from Modern Analytical Techniques (MAT) II and Kinetics II. Using the knowledge from Kinetics II you will then plan and carry out an investigation into rates of reaction. The investigation write up will be due in September and is an entrance requirement for Y13. Wk Single 1 Single 2 Double 1 Kinetics II Lesson 1 Lesson 2 MAT II 2 Lesson 3 Mini test 3 Rates investigation Intro Rates investigation trials 4 Test Rates investigation trials / experiment 5 Rates investigation Experiment No lessons

Kinetics II Lesson 1 Lesson 2 Lesson 3 Lesson 4 (test)

Kinetics II – Lesson 1 Starter… H/W… If you miss a session you MUST download the PowerPoint from the shared area and collect associated materials, this is your responsibility. Starter… Match the method of measuring rate to the picture to the description. H/W… Complete practice questions, use the graph paper - see last slide Card sort separate You must complete all homeworks or you will not be allowed onto Y13 chemistry. No excuses

Gas volume - notes Review question maybe using a mind map on a white board

Loss of mass - notes Review question maybe using a mind map on a white board

Colour change - notes https://www.youtube.com/watch?v=yrXZXGbg9KI Review question maybe using a mind map on a white board https://www.youtube.com/watch?v=yrXZXGbg9KI

pH, titration and conductivity - notes pH = -log [H+] [H+] = 10-pH Review question maybe using a mind map on a white board

X + Y  Z Consider the reaction GCSE = increasing the concentration of the reactants, increases the rate of the reaction. A-level = Does increasing the individual reactants affect the rate the same? Does increasing the concentration of X increase the rate the same as increasing Y?

How does the concentration change with time? Using these techniques you can plot a graph of time vs concentration of [X] and the graph may look like… As time increases, the concentration decreases directly proportionally. As time increases, the concentration decrease at slightly increasing rate initially but then starts to level off. As time increases, the concentration decreases rapidly at first then the rate decreases less until it levels off.

How else can we show this? Rate of reaction is the change in concentration per unit time therefore we can plot a graph of concentration vs rate to see how the concentration of [X] affects the rate.

tangents What is the rate at 11s? 13cm3 Rate = 13cm3 8s 8 s

How does conc affect the rate of reaction? The rate can be calculated by either drawing a tangent at several points or calculate the 1/t to give an estimate. Remain the same (no effect) Increase (directly proportional) Increase (directly proportional to the conc squared) [X] doubles = rate remains the same [X] doubles = rate double [X] doubles = rate quadruples

Questions – Time/concentration

Answers – Time/concentration

Practice – Concentration/rate [X] (mol dm-3) Rate (mol dm-3 s-1) 0.100 0.0055 0.210 0.0116 0.285 0.0157 0.420 0.0231 0.540 0.0297 0.700 0.0385 Draw a concentration / rate graph and determine the order of the reaction with respect to X.

Answers – Concentration/rate 1st order

Homework 1. Draw a concentration / rate graph and determine the order of the reaction with respect to Y. 2. Calculate the rate usind 1/t then draw a concentration / rate graph and determine the order of the reaction with respect to Z. [Y] (mol dm-3) Rate (mol dm-3 s-1) 0.120 1.76 x10-6 0.200 4.80 x10-6 0.320 12.9 x10-6 0.445 23.8 x10-6 0.560 37.6 x10-6 [Z] (mol dm-3) Time (s) 0.025 302 0.050 156 0.075 104 0.100 81 0.125 63 0.150 51