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Gas Emission from an Alka-Seltzer Tablet

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Nick Kember Gas Emission from an Alka-Seltzer Tablet Introduction The Experiment is to see how much gas you get from 1 Alka-Seltzer tablet and also how long it takes to collect 100cm� of gas using the 1 tablet in 100cm� of water. Aim The task set was to find out how rates of reaction of an Alka-Seltzer tablet dissolving in water, change when place in with varying conditions within the outline task a smaller task was set to see how long it takes to collect 100cm� of gas. Variables These are all things that may effect the rate at which the Alka-Seltzer tablet dissolves. Water temperature Surface area Water volume Catalyst Concentration The Collision Theory The collision theory explains why surface area can affect the speed (rate) ...read more.


* With a powder, lots of particles are exposed and the rate can be very, very, fast. Diagram of Apparatus Method We set out the experiment as in the diagram. Then I got the measuring tube and filled it completely with water placing my hand over the top I then place it into the water not letting any escape. I placed the end over the collecting tube. I then took the conical flask, which in I placed 100cm� of water, this was room temperature. (This was for the room temperature experiment). I then got an Alka-Seltzer tablet opened the packet and places it into the conical flask placing the bung in and starting the stop clock. ...read more.


I repeated the experiment with each of these different surface areas using 100cm� of water at room temperature and took down the results. Predictions I predict that the whole Alka-Seltzer tablet will produce gas fairly quickly at room temperature as the temperature increases so will the rate of reaction and the rate that the gas gas is produced. When the tablet is cut into smaller pieces and the surface area is increased the rate the reaction takes place will be faster and will produce the gas much quicker. Results Temperature 1 2 3 Average Room temp. 20�C 45.65s 44.84s 46.38s 45.62s 40�C 12.68s 7.56s 7.75s 9.33s 60�C 5.43s 5.12s 4.78s 5.11s 80�C 4.46s 4.43s 4.93s 4.94s Tablet Size 1 2 3 Average Whole tablet 55.01s 56.57s 56.60s 56.06s Crushed tablet 37.76s 35.65s 36.07s 36.16s Half 44.43s 43.12s 43.50s 39.32s Quater 39.05s 38.76s 40.15s 39.32s ...read more.

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