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Rate of reaction of Magnesium and HCL

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In order to find a good set of results for this experiment I need to decide what molars i am going to use, and also how i will make them. Once i have found which molars i would like to use i will give evidence of why i have chosen them, i will also decide which variables are important to considerm e.g The Values of Mg, Volume of acid. I also need to think about how i am going to measure the speed of the reaction in order to get a table of reliable results. Plan * Equipment needed for experiment: * Bowl * Hcl * 2 Measuring cylinders (1 big/1 small) * Mg strips * Flask * Beaker * Tube * Stop clock * Goggles * Beehive shell Step One All of the above equipment must be gathered. Step Two The Beehive shell sould be placed in the centre inside the bowl, then the bowl is to be filled up with water until the beehive shell is covered.Then the big measuring cylinder is to be filled to the top with water and then turned upside down onto the beehive shell. Step Three The tube should be placed directly over the hole in the beehive shell, where the tube(which goes through the hole in the beehive shell and is connected to the flask) ...read more.


The surface area will stay the same as we are using a Magnesium strip each time. I will not use a catalyst in the reaction as the reaction would go too quickly. It will be hard to keep the temperature the same as the reaction is exothermic which means the solution will heat itself through the reaction. To try and keep the temperature at one level i will measure the temperature before and after and check that the increase in temperature each time is the same. Prediction I think the rate of reaction will be much faster in a higher concentration as there are more particles in a level of higher concentration, so therefore more successful collisions. If i use 2 Molar instead of 1 Molar the rate of reaction will also be faster as there are twice the amount of particles in 2 Molar. Concentration Values The concentration values i am going to use are: Upper Limit * 1.75 * 1.5 * 1.25 * 1.0 * 0.75 Lower Limit Length of Magnesium: 4 Cm Concentration of Hcl Acid: Start with 20cm3 To get 1.75m add 2.5 cm3 of water To get 1.5m add 5cm3 of water To get 1.25m add 7.5cm3 of water To get 1.0m add 10cm3 of water To get 0.75m add 12.5cm3 of water I am going to measure the amount of Hydrogen produced every: 10 seconds Tables of Results Time Volume of gas cm3 ...read more.


The results, when plotted onto a graph show that as time goes on, the amount of gas increases. The results form a curv which also proves that the results are reliable. Also the points plotted onto the graph group arounf the line of best fit. The tables which i wrote the results into also show that the results are reliable as they are similar. There were some sources of error in the experiment. One of these was the measurments of the gas. In our preliminary work we used 2cm of Mg, this made the experiment too fast, we also used 2cm Acid but that too was too fast. The temperature effected the experiment. The temperature cannot be controlled completelt and changes automatically on its own. The increase in temperature during a reaction causes the rate of reaction to increase. Overall the experiment went well and the results i found were reliable, but there could have been a few changes to the experiment which could of made it a little bit more accurate. The magnesium strips could have been made pure by scraping the impurities from them so that we are left with just pure magnesium also the measurments of gas could have been more accurate with the use of a gas siringe which measures out an exact amount of gas. The readings could have also been made more accurate if we got down at eye level with the tube and got the exact readings at teh time needed. ...read more.

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