Explain and use the terms: order and half-life.

Slides:

Advertisements

Similar presentations

KINETICS -REACTION RATES

Advertisements

© Pearson Education Ltd Copying permitted for purchasing institution only. This material is not copyright free. This document may have been altered.

K c and equilibrium. What does K c signify? If K c = 1 then the position of equilibrium is half way between products and reactants If K c > 1 then the.

Explain that infrared radiation is absorbed by C=O, O–H and C–H bonds in CO 2, H 2 O and CH 4, and this contributes to global warming. Explain that the.

Outline the use of alkenes in the manufacture of margarine by catalytic hydrogenation of unsaturated vegetable oils. Outline the use of alkenes in the.

Explain that ozone is continuously being formed and broken down in the stratosphere by ultraviolet radiation. Describe, using equilibria, how the ozone.

Week 14 © Pearson Education Ltd 2009 This document may have been altered from the original Explain and use the term: rate of reaction. Deduce the rate.

Rate Orders and Rate Laws. Reaction Rates Are measured as the change in concentration over time. ∆[reactants] Are measured as the change in concentration.

1. Kinetics 1.1 The rate of chemical reactions 1.2 The rate expression and order of reaction 1.3 Determining the rate equation 1.4 The rate determining.

Integrated Rate Laws How to solve.

State that enzymes are globular proteins with a specific tertiary structure. State that enzymes catalyse metabolic reactions in living organisms. © Pearson.

Describe how the model of the atom has changed over the years, and how it continues to do so. Understand that scientific knowledge is always evolving.

Week 23 © Pearson Education Ltd 2009 This document may have been altered from the original Use the enthalpy change of solution of a simple ionic solid.

Calculate enthalpy changes directly from appropriate experimental results, including the use of the relationship: energy change = mcΔT. Week 23 © Pearson.

Week 21 © Pearson Education Ltd 2009 This document may have been altered from the original Describe what is meant by a buffer solution. State that a buffer.

Week 4 © Pearson Education Ltd 2009 This document may have been altered from the original Explain the water solubility of carboxylic acids. Describe the.

11.1: Meaning of Reaction Rates 1 Define Reaction Rates How to Express Reaction Rates Can You Write an Expression Rate Concentration vs. Time Curve Determining.

Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. To know how to tell that.

From Method of Initial Rates to Integrated Rate Law

Know the formulae of common acids and bases. State that an acid releases H + ions in aqueous solution. State that common bases are metal oxides, metal.

Week 7 © Pearson Education Ltd 2009 This document may have been altered from the original State the general formula for an α-amino acid as RCH(NH 2 )COOH.

Week 2 © Pearson Education Ltd 2009 This document may have been altered from the original Explain the relative resistance to bromination of benzene compared.

Week 25 © Pearson Education Ltd 2009 This document may have been altered from the original Explain the terms: redox, oxidation number, half-reaction, oxidising.

Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education This document may have been altered from the original. To understand an easy way.

Give reasons why non-invasive techniques are needed for diagnosis. Describe the properties of ultrasound.

Unit 3: Chemical Kinetics

©2004 by Pearson Education. ©2004 by Pearson Education.

©2004 by Pearson Education. ©2004 by Pearson Education.

Predict the splitting patterns of the protons in a given molecule.

Olympic Records Can you deduce which event Graph 1 represents?

Describe dative covalent (coordinate) bonding.

• Describe a covalent bond as a shared pair of electrons.

Describe the reactions of amines with acids to form salts.

Week 28 • Explain that ozone is continuously being formed and broken down in the stratosphere by ultraviolet radiation. • Describe, using equilibria,

First-Order Rate = k[A] Integrated: ln[A] = –kt + ln[A]o

Recognise and name aldehydes and ketones.

Define pH as pH = –log[H+(aq)]. Define [H+] = 10–pH.

LECTURE 9.2 – ALTERING RATES

Week 5 Describe a triglyceride as a triester of glycerol (propane-1,2,3-triol) and fatty acids. Compare the structures of saturated fats, unsaturated fats.

Week 30 Describe redox behaviour in transition elements using suitable examples. Carry out redox titrations and carry out structured calculations involving.

Apply the principles of electrode potentials to modern storage cells.

• Describe early attempts to order the elements.

State the use of polyamides as fibres in clothing.

Explain and use the term: lattice enthalpy.

Week 14 • Explain the use of crude oil as a source of hydrocarbons, as well as their uses. • Explain that the hydrocarbons in crude oil are separated.

• Explain the trend in boiling points of Cl2, Br2 and I2.

Deduce, from orders, a rate equation of the form rate = k[A]m[B]n.

Week 24 Explain that entropy is a measure of the disorder of a system, and that a system becomes energetically more stable when it becomes more disordered.

Week 13 Analyse absorptions in an infrared spectrum to identify the presence of functional groups in an organic compound. Analyse molecular ion peaks and.

• Explain the overlap of adjacent p-orbitals to form a π-bond.

Describe an acid as a proton donor and a base as a proton acceptor.

Describe the elements Ti–Cu as transition elements.

• Describe the structure, general formula and uses of halogenoalkanes.

• Outline the uses of ethanol and methanol.

Explain and use the term: rate of reaction.

• Define and use the term molar mass.

Explain the term ligand in terms of coordinate bonding.

• Understand that energy is conserved.

• Explain how a permanent dipole can result in a polar bond.

Explain the terms: arene and aromatic.

Week 29 • Explain the formation of carbon monoxide, oxides of nitrogen and unburnt hydrocarbons from the internal combustion engine. • State environmental.

Understand the significance of Kc values.

• Describe the three common mechanisms required for AS chemistry

• State that noble gases have a stable electron configuration.

Determine the units for Kc.

• Explain the trend in reactivity of Group 2 elements down the group.

• State le Chatelier’s principle.

Presentation transcript:

Explain and use the terms: order and half-life. Week 15 Explain and use the terms: order and half-life. Deduce the half-life of a first-order reaction from a concentration–time graph. State that the half-life of a first-order reaction is independent of the concentration. © Pearson Education Ltd 2009 This document may have been altered from the original

Week 15 Measuring half-lives © Pearson Education Ltd 2009 This document may have been altered from the original

Week 15 Other concentration–time graphs: (a) zero-order, (b) first-order, (c) second-order (a) (b) (c) © Pearson Education Ltd 2009 This document may have been altered from the original 3

Week 15 Deduce the order (0, 1 or 2) with respect to a reactant from a rate–concentration graph. Determine, using the initial rates method, the order (0, 1 or 2) with respect to a reactant. © Pearson Education Ltd 2009 This document may have been altered from the original

Week 15 Orders and rate–concentration graphs: (a) zero-order, (b) first-order, (c) second-order (a) (b) (c) © Pearson Education Ltd 2009 This document may have been altered from the original