Results_of_Alka-Seltzer_Experiments

Results_of_Alka-Seltzer_Experiments - M at the end) divided...

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UMass Boston, Chem 116 ©H.Sev ian 1 Results of Alka-Seltzer Experiments 47.0 37.7 34.0 69.8 59.6 Average time (s) 1916 1916 1916 3832 1916 mg of lim reagent 45.6 45.6 45.6 45.6 22.8 mmol lim reagent 200 100 100 100 100 mL water Rate = (change in molarity of limiting reactant that reacted) / (average time for the reaction to reach apparent completion) 0.0024 0.0061 0.0067 0.0065 0.0038 Avg Rate (M/s) 0.114 0.228 0.228 0.456 0.228 Initial concen (M) 48 50 16 57 62 15 23 46 14 47 51 13 60 69 12 53 64 11 40 60 10 20 67 9 40 8 37 52 7 30 60 6 29 5 66 56 4 67 62 3 88 80 2 58 55 1 D) 2x H2O C) crushed B) warm H2O A) 2x tablets Control Expt # In one Alka-Seltzer tablet, there are 1916 mg of the limiting reagent, sodium bicarbonate (f.w. 84.0). Thus the average rate of the reaction was calculated as the change in reactant molarity (from M of reactant present at
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Unformatted text preview: M at the end) divided by the time for the reaction to reach apparent completion (in seconds). Extra credit assignment (due at beginning of class (2:00) on Tues Oct 14) Make a table like the following and fill it out In the Results column, explain in words what the results were and how they compare to the control Your answers in the Why I think that happened column do not need to be correct, but they do need to be what you think. D) Twice as much water used C) Tablet crushed first before adding to water B) Warm water instead of room temp water A) Two tablets instead of one Why I think that happened Results of this experiment in class...
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