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EXPERIMENT TO INVESTIGATE INTO THE EFFECT OF SURFACE AREA OF A SOLID REACTANT ON THE RATE OF REACTION

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Introduction

EXPERIMENT TO INVESTIGATE INTO THE EFFECT OF SURFACE AREA OF A SOLID REACTANT ON THE RATE OF REACTION AIM To investigate the effect of particle size on the rate of the chemical reaction. METHOD * 20cm� 1.0 mol/l hydrochloric acid solution was measured and poured into beaker. * 2.0g of calcium carbonate was weighed on the filter paper. * Beaker containing acid, filter paper with calcium carbonate was placed on a balance. * The total contents were weighed on the balance pan. The mass was recorded. * Calcium carbonate from filter paper was transferred into acid in the beaker. At the same time stop clock was started. * The mass was recorded with three particle size samples. ...read more.

Middle

0.143 0.172 0.263 480 (8 mins) 0.147 0.213 0.293 600 (10 mins) 0.2 0.25 0.311 Table 1 In this experiment, calcium carbonate was reacted with hydrochloric acid, which produces carbon dioxide and water. Hydrochloric acid + Calcium carbonate � calcium chloride + Carbon dioxide + Water HCl + CaCO3 � CaCl2 + CO2 + H2O Graph A The above experiment was performed with three different sizes of calcium carbonate. The results of each sample were shown in table 1. It was made sure that every sample gets the same amount of acid and time to react. The readings in table 1 were plotted in graph A for further analysis. CONCLUSIONS The graph A explains the effect of surface area on the rate of chemical reaction. The large pieces are represented by blue line. ...read more.

Conclusion

The total mass lost for medium pieces was 0.25g. The small pieces of calcium carbonate are represented by yellow line. As it can be seen from graph A that initially smaller pieces reacted faster then other two samples. The rate of reaction was very fast and more calcium carbonate was reacted with acid. This was because the more surface area was exposed to acid which eventually increased the rate of reaction. The total mass lost for small pieces was 0.311g. According to the above discussion which is based on readings plotted in graph A, it can be concluded that small sample of calcium carbonate reacted more efficiently then other two samples. Therefore, it can be concluded that if more surface area is exposed to acid, there will be more rate of chemical reaction. Smaller the pieces faster the rate of reaction ?? ?? ?? ?? 1 ...read more.

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