Rates Of Reaction
Bayani Gaba-gaba
Some reactions are over in a flash, like the explosion of a firework. Others take millions of years, like the rusting of iron deep underground. What controls how fast a reaction goes, and how can we speed one up or slow one down?
In this lesson you will learn the five factors that affect reaction rate, explain each one using collision theory, interpret rate graphs, and understand how catalysts work by providing an alternative pathway with lower activation energy. Rates questions appear on both Edexcel papers every session.
Manufura
- describe experiments to investigate the effects of changes in surface area of a solid, concentration of a solution, temperature and the use of a catalyst on the rate of a reaction
- describe the effects of changes in surface area of a solid, concentration of a solution, pressure of a gas, temperature and the use of a catalyst on the rate of a reaction
- explain the effects of changes in surface area of a solid, concentration of a solution, pressure of a gas and temperature on the rate of a reaction in terms of particle collision theory
- know that a catalyst is a substance that increases the rate of a reaction, but is chemically unchanged at the end of the reaction
- know that a catalyst works by providing an alternative pathway with lower activation energy
- draw and explain reaction profile diagrams showing ΔH and activation energy
- practical: investigate the effect of changing the surface area of marble chips and of changing the concentration of hydrochloric acid on the rate of reaction between marble chips and dilute hydrochloric acid
- practical: investigate the effect of different solids on the catalytic decomposition of hydrogen peroxide solution
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Rates Of Reaction. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which factor does NOT affect the rate of reaction? A) Temperature B) Concentration C) Colour of the reactants D) Surface area Answer: C
- A catalyst works by: A) Increasing the temperature B) Providing an alternative pathway with lower activation energy C) Increasing the concentration of reactants D) Being used up in the reaction Answer: B
- On a rate graph, the reaction has finished when: A) The gradient is steepest B) The curve levels off C) The curve starts D) The curve crosses the y-axis Answer: B
- Increasing temperature increases rate because: A) It decreases the activation energy B) It increases the frequency of successful collisions C) It removes the need for collisions D) It creates new reactant particles Answer: B
- Crushing a solid reactant into a powder increases the rate by: A) Lowering the activation energy B) Increasing the surface area exposed to other reactants C) Increasing the mass of the solid D) Changing the products of the reaction Answer: B
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Kana son yin aikin tambayoyin gwaji kan Rates Of Reaction? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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