SASS Chem Rate of Rxn Summary

ST ANDREW’S SECONDARY SCHOOL NAME TEACHING GROUP CHEMISTRY Rate of Reactions Factors affecting Rate of Chemical Reactions: [Summary] & [Answering Templates] AN INCREASEIN TEMPERATUREINCREASESTHE RATE OF REACTION •↑kinetic energy of reacting particles and move faster•↑proportion of reacting particles possess energy that is greater than or equal to activation energy•reacting particles collidemore frequently•↑frequency ofeffective collisions Temperature 8 5070/41/M/J/11© UCLES 2011 ForExaminer’sUse 7 A student adds an excess of zinc to 50 cm3 of 1.00 mol / dm3 hydrochloric acid at 20 °C. Hydrogen is produced. The experiment is repeated at 30 °C and 40 °C. In each case the volume of hydrogen collected is plotted against time. Which one of the following represents the volumes of hydrogen produced in the three experiments? 40°C 30°C 20°C time / s (a) 00 Volume ofhydrogen /cm3 40°C30°C30°C30°C 20°C time / s (b) 00 Volume ofhydrogen /cm3 20°C 30°C30°C30°C 40°C time / s00 Volume ofhydrogen /cm3 20°C 40°C time / s00 Volume ofhydrogen /cm3 30°C30°C30°C (c) (d) [Total: 1] 8 Which of the following is not a reaction of ethene? (a) Ethene reacts with ethanoic acid to form an ester. (b) Ethene polymerises into a material which is used to make plastic bags. (c) Ethene burns to form carbon dioxide and water. (d) Ethene decolourises aqueous bromine. [Total: 1] amount of productsformed / mol AN INCREASEIN CONCENTRATIONINCREASESTHE RATE OF REACTION •↑concentration of reactants, ↑number of reacting particles per unit volume•reactingparticles collide more frequently•↑frequencyofeffectivecollisions Concentration(solutions only)8 © UCLES 2018 0439/11/O/N/18 16 C a l c i u m c a r b o n a t e r e a c t s w i t h d i l u t e h y d r o c h l o r i c a c i d t o m a k e c a r b o n d i o x i d e g a s . G r a p h X shows the results of this experiment. The particle size of the calcium carbonate is increased and the experiment is repeated. All other conditions are kept the same. Graph Y shows the results of this experiment. Which diagram is correct for the two experiments? volume of carbon dioxide produced / cm3 time / s A X Y volume of carbon dioxide produced / cm3 time / s B X Y Y X volume of carbon dioxide produced / cm3 time / s C Y X volume of carbon dioxide produced / cm3 time / s D 00 00 00 00 17 P a r t o f t h e P e r i o d i c T a b l e i s s h o w n . Which element forms an oxide that reacts with dilute acid to form a salt and water? I II III IV V VI VII VIII CD AB time/s00amount of productsformed / molXmol/dm3of LR 2Xmol/dm3of LR 8 © UCLES 2018 0439/11/O/N/18 16 C a l c i u m c a r b o n a t e r e a c t s w i t h d i l u t e h y d r o c h l o r i c a c i d t o m a k e c a r b o n d i o x i d e g a s . G r a p h X shows the results of this experiment. The particle size of the calcium carbonate is increased and the experiment is repeated. All other conditions are kept the same. Graph Y shows the results of this experiment. Which diagram is correct for the two experiments? volume of carbon dioxide produced / cm3 time / s A X Y volume of carbon dioxide produced / cm3 time / s B X Y Y X volume of carbon dioxide produced / cm3 time / s C Y X volume of carbon dioxide produced / cm3 time / s D 00 00 00 00 17 P a r t o f t h e P e r i o d i c T a b l e i s s h o w n . Which element forms an oxide that reacts with dilute acid to form a salt and water? I II III IV V VI VII VIII CD AB 2Xmol/dm3of ER Xmol/dm3of ER 00time/s amount of productsformed / mol USEOF A CATALYSTINCREASESTHE RATE OF REACTION •catalyst provides an alternative pathway of lower activation energy•↑proportion of reacting particles with energy that is greater than or equal tothe activation energy•↑frequency ofeffective collisions Catalyst 8 © UCLES 2018 0439/11/O/N/18 16 C a l c i u m c a r b o n a t e r e a c t s w i t h d i l u t e h y d r o c h l o r i c a c i d t o m a k e c a r b o n d i o x i d e g a s . G r a p h X shows the results of this experiment. The particle size of the calcium carbonate is increased and the experiment is repeated. All other conditions are kept the same. Graph Y shows the results of this experiment. Which diagram is correct for the two experiments? volume of carbon dioxide produced / cm3 time / s A X Y volume of carbon dioxide produced / cm3 time / s B X Y Y X volume of carbon dioxide produced / cm3 time / s C Y X volume of carbon dioxide produced / cm3 time / s D 0 0 0 0 0 0 0 0 17 P a r t o f t h e P e r i o d i c T a b l e i s s h o w n . Which element forms an oxide that reacts with dilute acid to form a salt and water? I II III IV V VI VII VIII CD AB With catalyst used 00time/s Without catalyst used amount of productsformed / mol A DECREASEIN PARTICLE SIZEINCREASESTHE RATE OF REACTION •↓sizeofreacting particles,↑surface area available (total mass & total volume remains unchanged) •↑frequency of effective collisions Particle size (solids only) 8 © UCLES 2018 0439/11/O/N/18 16 C a l c i u m c a r b o n a t e r e a c t s w i t h d i l u t e h y d r o c h l o r i c a c i d t o m a k e c a r b o n d i o x i d e g a s . G r a p h X shows the results of this experiment. The particle size of the calcium carbonate is increased and the experiment is repeated. All other conditions are kept the same. Graph Y shows the results of this experiment. Which diagram is correct for the two experiments? volume of carbon dioxide produced / cm3 time / s A X Y volume of carbon dioxide produced / cm3 time / s B X Y Y X volume of carbon dioxide produced / cm3 time / s C Y X volume of carbon dioxide produced / cm3 time / s D 0 0 0 0 0 0 0 0 17 P a r t o f t h e P e r i o d i c T a b l e i s s h o w n . Which element forms an oxide that reacts with dilute acid to form a salt and water? I II III IV V VI VII VIII CD AB Smaller particle size 00time/s Larger particle size amount of productsformed / mol AN INCREASEIN PRESSUREINCREASESTHE RATE OF REACTION •↑pressure, ↓volume•reacting particles get closer and collide more frequently•↑frequency ofeffective collisions Pressure (gases only) 8 © UCLES 2018 0439/11/O/N/18 16 C a l c i u m c a r b o n a t e r e a c t s w i t h d i l u t e h y d r o c h l o r i c a c i d t o m a k e c a r b o n d i o x i d e g a s . G r a p h X shows the results of this experiment. The particle size of the calcium carbonate is increased and the experiment is repeated. All other conditions are kept the same. Graph Y shows the results of this experiment. Which diagram is correct for the two experiments? volume of carbon dioxide produced / cm3 time / s A X Y volume of carbon dioxide produced / cm3 time / s B X Y Y X volume of carbon dioxide produced / cm3 time / s C Y X volume of carbon dioxide produced / cm3 time / s D 0 0 0 0 0 0 0 0 17 P a r t o f t h e P e r i o d i c T a b l e i s s h o w n . Which element forms an oxide that reacts with dilute acid to form a salt and water? I II III IV V VI VII VIII CD AB Higher pressure 00time/s Lower pressure amount of productsformed / mol