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Investigating the effect of temperature and surface area on the reaction between sodium bicarbonate tablets and hydrochloric acid

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Introduction

Science Coursework Investigating the effect of temperature and surface area on the reaction between sodium bicarbonate tablets and hydrochloric acid ???? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Prediction In the experiment I predict that the higher the temperature the faster the reaction time will be and that the larger the surface area the faster the reaction time. This is because of collision theory. Particles only react when they collide with enough energy for the reaction to take place. when you heat them you are giving them energy and so they move faster and therefore collide more often and with greater energy. More successful collisions per second means a faster rate of reaction. Using a powder instead of a lump means the surface area is greater, which means a greater area of reactant is exposed and so available for a collision. ...read more.

Middle

Fair test To make this test fair there are some things that I'll have to do: * First all the hydrochloric acid must be of the same concentration. * Once I have ground up the tablet I must make shore that all of the powder goes into the hydrochloric acid. * Every time I do the experiment I will replace the hydrochloric acid with a new supply. Apparatus: The apparatus that I shall be using are: a bowl and pestle hydrochloric acid a stop watch sodamint tablets a beaker a Bunsen burner a thermometer Method First I will set up the apparatus then I will ready a stop watch and drop a sodamint tablet into the hydrochloric acid and time how long the reaction will take and record the results. ...read more.

Conclusion

time (2) room temp hole 3.21 3.18 room temp crushed .56 1.00 40 hole 1.57 2.05 40 crushed .21 .27 60 hole 1.13 1.10 60 crushed .9 .9 80 hole .48 .43 80 crushed .8 .7 100 hole .29 .25 100 crushed .5 .5 Interpretation of results My results show that what I predicted was correct. The larger the surface area the faster the surface area and the higher the temperature the faster the reaction. Evaluation It wasn't a fair test because we never got the temperature of the hydrochloric acid exactly right and sometimes kept changing, but did however stay within 5*c of the recorded temperature. Also when I tipped the powdered sodamint tablets into the hydrochloric acid very small amounts of it were left in the bowl. ?? ?? ?? ?? Mitchell Gayle ...read more.

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