Rate Of Reaction
Overzicht
Some reactions are over in a flash, like an explosion, while others, like iron rusting, take years. The rate of reaction measures how fast reactants turn into products, and chemists can speed it up or slow it down by changing the conditions.
In this lesson you will learn what rate of reaction means, how collision theory explains it, and how concentration, surface area, temperature and catalysts change the rate. You will also see how the slope of a graph shows the rate as a reaction proceeds.
Doelstellingen
- Describe the effect on the rate of reaction of: (a) changing the concentration of solutions (b) changing the pressure of gases (c) changing the surface area of solids (d) changing the temperature (e) adding or removing a catalyst, including enzymes.
- State that a catalyst increases the rate of a reaction and is unchanged at the end of a reaction.
- Describe practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas.
- Interpret data, including graphs, from rate of reaction experiments.
- [Supplement] Describe collision theory in terms of: (a) number of particles per unit volume (b) frequency of collisions between particles (c) kinetic energy of particles (d) activation energy, E a.
- [Supplement] Describe and explain the effect on the rate of reaction of: (a) changing the concentration of solutions (b) changing the pressure of gases (c) changing the surface area of solids (d) changing the temperature (e) adding or removing a catalyst, including enzymes using collision theory.
- [Supplement] State that a catalyst decreases the activation energy, E , of a reaction a.
- [Supplement] Evaluate practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas.
Audioles
Luister naar deze les in de app
Mindmap
Dit onderwerp is in kaart gebracht zodat je ziet hoe de ideeen samenhangen.
Open de mindmap in de app
Flashcards
Snelle geheugentraining op wat bij dit onderwerp getoetst wordt.
Oefen deze kaarten in de app
Lesnotitie
Volledige lesnotitie beschikbaar in de Green Bridge-app
Installeer de Green Bridge CBT-app op je telefoon of computer voor de volledige IGCSE-bibliotheek: examens uit voorgaande jaren, correctiemodellen, mindmaps, flashcards en audiolessen.
Lesevaluatie
Gefeliciteerd met het voltooien van de les op Rate Of Reaction. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.
Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.
Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.
- For a reaction to occur, particles must collide with: A. Any energy at all B. At least the activation energy C. No energy D. Equal masses Answer: B
- Increasing the concentration of a reactant increases the rate because: A. The particles are heavier B. There are more frequent collisions C. The activation energy falls D. The temperature rises Answer: B
- Powdering a solid reactant speeds up the reaction because it: A. Lowers the temperature B. Increases the surface area C. Adds a catalyst D. Removes collisions Answer: B
- A catalyst increases the rate of reaction by: A. Being used up B. Raising the activation energy C. Lowering the activation energy D. Cooling the mixture Answer: C
- On a graph of product formed against time, the rate is greatest where the slope is: A. Flattest B. Steepest C. Negative D. Zero Answer: B
Maak deze vragen in de app
Maak deze vragen in de app
Aanbevolen Boeken
Verder leren met open bronnen
-
Leerboekparagraaf
Factors Affecting Reaction Rates
Describe the effects of chemical nature, physical state, temperature, concentration, and catalysis on reaction rates
"Chemistry: Factors Affecting Reaction Rates" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/12-2-factors-affecting-reaction-rates. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
-
Leerboekparagraaf
Collision Theory
Use the postulates of collision theory to explain the effects of physical state, temperature, and concentration on reaction rates
"Chemistry: Collision Theory" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/12-5-collision-theory. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Gepubliceerd door andere organisaties onder open licenties, vermeld zoals zij vragen. Links openen hun websites.
Oefen Proefexamenvragen
Wilt u proefexamenvragen over Rate Of Reaction oefenen? Download de Green Bridge CBT-app voor toegang tot proefexamenvragen en volledige oefentoetsen over dit onderwerp.
Download de app in de Google Playstore
Alles wat je nodig hebt om uit te blinken in JAMB, WAEC en NECO.
