Surface area will increase the speed of reaction as the greater the surface of the solid reactants, the more particles are required to expose and ‘cover’ the capacity of the solid. Increased surface area results in an increased chance of collisions between reactant particles. Since the collisions become more frequent and abundant, the rate of reaction increases. Aim
The aim of the experiment is to see if a greater surface area of a dissolvable tablet creates a faster or slower reaction Independent Variable
The surface area of the tablet (halves, powdered and whole)
How fast the rate of reaction is to the surface area
The amount of water (250mL)
The type of dissolvable tablet
The overall weight of tablet
The greater the surface area of a solid reactant the faster its rate of reaction Materials
Beakers x 3
Mortar and Pestle
This experiment is relatively safe, however apron and sturdy non-slip shoes should be worn Method
Measure 250 mL into three beakers
Crush two tablets with mortar and pestle
Start the stopwatch when one full dissolvable tablet is dropped into the water 4.
Stop the stopwatch when the water stops fizzing
Repeat with half of a dissolvable tablet and record results 7.
Repeat with a powdered tablet and record results
Trial 1 (sec)
Trial 2 (sec)
From the data results, both trials are fairly similar and supply the same information. It shows that the whole tablet takes the longest to dissolve at an average of 78.3 seconds whilst halved tablets take an average of 65.3 seconds and powdered takes 18.8 seconds. This is because the increased surface area gives more particles to the reactant, creating more...
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