SASS Chem Speed of Reaction AfL

Page 1 ST ANDREW’S SECONDARY SCHOOL NAME CLASS DATE CHEMISTRY 17.1 Measuring Speed of Reaction SPEED OF REACTION Assessment for Learning Use the information provided below to answer questions 1 – 4. A student investigates the rate of reaction between marble chips and dilute acid using the apparatus shown. Effervescence was observed during the experiment. 1 What is the chemical formula of the marble chips? A CaCO3 B CaO C MgCO3 D MgO 2 Why is cotton wool used in this apparatus? A To prevent acid spray leaving the conical flask. B To prevent air from entering the conical flask. C To prevent any gas formed from escaping the conical flask. D To prevent excessive bumping of the conical flask by the vigorous reaction. 11 © UCLES 2009 0653/01/M/J/09 [Turn over 23 M a r b l e c h i p s r e a c t 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 a s s h o w n . CaCO3(s) + 2HCl (aq) → CaCl 2(aq) + H2O(l) + CO2(g) The progress of this reaction was followed using the apparatus shown. cotton wool balance Which graph shows the results of this experiment? balance reading time 0 0 balance reading time 0 0 balance reading time 0 0 balance reading time 0 0 A B DC 24 Testing for the gases chlorine, hydrogen and oxygen requires different methods. For which gases is a splint used? Cl 2 H2 O 2 A B C D cotton wool electronic balance dilute acidmarble chips

Page 2 3 Which graph shows the results of this experiment? 4 The student repeats the experiment using a different acid instead. All other variables were kept constant in both experiments. However, no effervescence was observed during this experiment. Which acid was used for this experiment? A CH3COOH B HCl C HNO3 D H2SO4 5 Which graph could represent the explosive combustion of methane gas? 11 © UCLES 2009 0653/01/M/J/09 [Turn over 23 M a r b l e c h i p s r e a c t 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 a s s h o w n . CaCO3(s) + 2HCl (aq) → CaCl 2(aq) + H2O(l) + CO2(g) The progress of this reaction was followed using the apparatus shown. cotton wool balance Which graph shows the results of this experiment? balance reading time 0 0 balance reading time 0 0 balance reading time 0 0 balance reading time 0 0 A B DC 24 Testing for the gases chlorine, hydrogen and oxygen requires different methods. For which gases is a splint used? Cl 2 H2 O 2 A B C D balancereading balancereading balancereading balancereading time time time time A B C D 11Which graph could represent the explosive combustion of methane? 12Which of the following are properties of the oxides of most non-metals? 13Aqueous ammonia is added to solutions containing the ions of four metals. aluminium copper( II) iron( III) zinc Which of these ions give a coloured precipitate? 0 0 time speed of reaction speed of reaction speed of reaction speed of reacti