18959167-10Rate-of-Reaction-f5

18959167-10Rate-of-Reaction-f5 - RATE OF REACTION/F5/HST...

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RATE OF REACTION/F5/HST HST/RATE OF REACTION/SMKPB 1 RATE OF REACTION 1. Concept Map 2. Rate of reaction (a) Rate of reaction is the …………………at which reactants react to form products in a chemical reaction. (b) Not all chemical reactions have the same rate of reaction, some reactions occur ……………… with rate of reaction that is ……………. . , and some reactions occur ……………… with rate of reaction that is ……………. . . (c) Examples of fast chemical reaction: Type of reaction Example of chemical equation for the reaction Neutralisation Double decomposition reaction Acid with active metals Rate of reaction Observable changes in chemical reaction Average rate of reaction Rate of reaction at a given Factors affecting rate of reaction Collision Theory to explain factors affecting rate of reaction
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RATE OF REACTION/F5/HST HST/RATE OF REACTION/SMKPB 2 Combustion of magnesium (d) Examples of slow chemical reaction. Corrosion of iron Photosynthesis Reaction of hydrochloric acid with sodium thiosulphate solution. (e) Time taken for a fast chemical reaction is …………… and the time taken for slow chemical reaction of …………… . Hence the rate of reaction is …………………… to time taken for the reaction. (f) The rate of reaction can be determined by measuring the time taken for an observable chemical change to occur. Rate of reaction = Observable chemical change Time taken (g) The observable chemical changes in a chemical reaction are (i) ……………………………………………………………………………. (ii) …………………………………………………………………………… (iii) …………………………………………………………………………. (iv) ………………………………………………………………………… (v) …………………………………………………………………………. . (h) Rate of reaction can be defined as the rate of change of volume of gas produced per unit time. Rate of reaction = Change in volume of gas produced Time taken = ……………… cm 3 s -1 Rate of reaction α ………………. .
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HST/RATE OF REACTION/SMKPB 3 (i) Example: If 50.0 cm 3 of hydrogen gas is collected in 20 seconds during a chemical reaction between magnesium and dilute hydrochloric acid . What is the rate of reaction? Rate of reaction = = cm 3 s -1 (ii) Example: If 5.0 gram of magnesium ribbon reacts completely with dilute hydrochloric acid in 25s, what is the rate of reaction? Rate of reaction = = g s -1 . 3. To determine the rate of reaction from graph . (a) For a chemical reaction, if the concentration of reactants or mass of reactant is plotted against the time, sketch the graph produced: (b) For a chemical reaction, if the concentration of products or the volume of gas released is plotted against time, sketch the graph is produced. Concentration
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18959167-10Rate-of-Reaction-f5 - RATE OF REACTION/F5/HST...

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