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How does changing the concentration of hydrochloric acid alter the rate of its reaction with marble chips

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Introduction

How does changing the concentration of hydrochloric acid alter the rate of its reaction with marble chips. A reaction is when two particles (reactants) join to form a new product or products . A rate is a measure of how fast or how slow something is. Rate is a measurement of the change that happens in a single unit of time. The rate of a chemical reaction is how fast the reactants react. To find a rate of reaction you measure the amount of product given off by the reaction in a unit of time . In this piece of coursework I will be investigating whether the concentration of hydrochloric acid alters the rate of reaction with marble chips . In this experiment hydrochloric acid is added to marble chips (calcium carbonate) . The two reactants collide with each other the hydrochloric acid acts as a catalyst for the two reactants which causes particles from the reactants to collide into one another the higher the concentration of acid molecules the faster the gas will be given off. ...read more.

Middle

amount of weight lost from the conical flask , this weight loss was due to the gas from the reaction being released ( carbon dioxide). My group and I recorded the weight lost every 20 seconds for 140 seconds to measure the rate of reaction between the CACO3 and HCL. We then record the amount of weight lost from the conical flask every 20 seconds this was used to determine the rate of reaction between the two chemicals . every time we conducted the experiment we used a different molar of acid to see if it affected the rate of reaction. To make this experiment a fair test we conducted every experiment twice to see that there were no bad results. To conduct this method for our experiment we did preliminary experiments to determine which type of method best suited the experiment and how we could get the most accurate results for our experiment. We tried to different types of experiments one of which we used a water bath to see the gas exchange and how fast that happened to ...read more.

Conclusion

It is important that I do not change the weight cause it will greatly affect the rate of reaction. These variables need to be controlled because the surface area of the contents of the conical flask greatly affects the rate of reaction because it will make the reaction happen faster or slower and the concentration of hydrochloric acid should not change because the concentration affects the rate of reaction the greater the concentration then the faster the rate of reaction. I think that the higher the concentration of hydrochloric acid the faster the carbon dioxide will be given off. I think this because the higher the concentration of acid molecules the more particles available to react. Also the higher the concentration of acid particles the more chance of a particle having enough energy. The more particles available at any one time with enough energy means that in a given time more of the product is produced, or it takes a less amount of time to produce a certain amount of product, in this case Carbon Dioxide. ?? ?? ?? ?? Tom Brittain Rate of reaction coursework ...read more.

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