Rate Of Reaction
Übersicht
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.
Ziele
- 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.
Audiolektion
Diese Lektion in der App anhoren
Mindmap
Dieses Thema ist als Karte dargestellt, damit die Zusammenhange sichtbar werden.
Mindmap in der App offnen
Lernkarten
Schnelles Abfragen der Fakten, die zu diesem Thema gepruft werden.
Diese Karten in der App uben
Lektionshinweis
Vollstaendige Lernnotiz in der Green Bridge App
Holen Sie sich die Green Bridge CBT App auf Handy oder Computer fuer die komplette IGCSE-Bibliothek: fruehere Pruefungen, Bewertungsschemata, Mindmaps, Lernkarten und Audiolektionen.
Unterrichtsbewertung
Herzlichen Glückwunsch zum Abschluss der Lektion über Rate Of Reaction. Jetzt, da Sie die wichtigsten Konzepte und Ideen erkundet haben,
Sie werden auf eine Mischung verschiedener Fragetypen stoßen, darunter Multiple-Choice-Fragen, Kurzantwortfragen und Aufsatzfragen. Jede Frage ist sorgfältig ausgearbeitet, um verschiedene Aspekte Ihres Wissens und Ihrer kritischen Denkfähigkeiten zu bewerten.
Nutzen Sie diesen Bewertungsteil als Gelegenheit, Ihr Verständnis des Themas zu festigen und Bereiche zu identifizieren, in denen Sie möglicherweise zusätzlichen Lernbedarf haben.
- 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
Bearbeiten Sie diese Fragen in der App
Bearbeiten Sie diese Fragen in der App
Empfohlene Bücher
Weiterlernen mit offenen Quellen
-
Lehrbuchabschnitt
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
-
Lehrbuchabschnitt
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
Von anderen Organisationen unter offenen Lizenzen veröffentlicht und wie gewünscht genannt. Links öffnen deren Websites.
Übungsklausuren üben
Möchten Sie Übungsklausuren zu Rate Of Reaction üben? Laden Sie die Green Bridge CBT App herunter, um Übungsklausuren und vollständige Prüfungssimulationen zu diesem Thema zu erhalten.
Lade die App im Google Playstore herunter.
Alles, was du brauchst, um in JAMB, WAEC & NECO zu glänzen.
