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Steve knows that hydrogen peroxide decomposes to produce oxygen and water, and that catalysts can be used to speed up this reaction. Steve conducted a series of experiments to investigate the effect of mass of catalyst on the rate of decomposition of hydrogen peroxide. For each experiment, he combined a different mass of the catalyst, manganese dioxide (MnO2), with 50cm3 of 0.8mol/dm3 hydrogen peroxide solution and measured the volume of oxygen produced. He then calculated the rate of reaction for each quantity of catalyst used and recorded the information in Table 1:
1) plot the graph. (i already did that). 2) From the graph, describe the relationship between the rate of reaction and the mass of the catalyst. 3) Explain how the catalyst affects the rate of the reaction as described in 2) 4) From the graph, determine the mass of oxygen produced after 10 s using 3.5g of the catalyst. 5) Draw a diagram of the apparatus that Steve should use for conducting this experiment and collecting the gas. 6) Steve conducted another experiment to compare the rate of decomposition of 0.3 mol/dm3 hydrogen peroxide using the same amounts of MnO2. On the same axes from the graph, sketch a graph to show how the rate of production of oxygen compares with that from experiment 1. Thanks a bunch!!
2) does the rate increase or decrease when you add more catalyst? 3) explain how the catalyst works (in general how solid catalysts work) 4) determine the rate of the reaction (how much oxygen per second is produced), multiply it by 10. 5) draw some sort of vessel 6) the rate of production is obviously less, i'd have to look at the data, but i don't download word files
by the way the topic is new and so i really don't understand :s
What exactly are you not understanding?
No. 4, 5 and 6
for number 3, find 3.5 on the mass axis and draw a straight line to intersect with the graph. Draw a line from this point to the rate axis and identify the rate. Multiply this by 10, because the rate is /sec. |dw:1378429015625:dw|
alright what about the last one? can you please give some sort of advice on how to go about doing it?
i gotta go do some stuff. I'll help you in a bit, sorry.
@Preetha @thomaster help?