Chemistry coursework rate of reaction marble chips

Calcium carbonate and hydrochloric acid experiment hypothesis

There is also the Arrhenius Equation relating rate of reaction and temperature - but this involves advanced level mathematics. Investigation of the reaction between hydrochloric acid and marble chips - Investigation of the reaction between hydrochloric acid and marble chips A chemical reaction is when two or more substance called reactants are chemically bonded to form a new product, as a result of the process, for a reaction to take place, the particles must have enough kinetic energy to collide and form new bonds , this is called a successful collision. Sample question 1 - Foundation Question Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. We are talking about an increased frequency of fruitful collisions, mainly because of the higher average kinetic energy of the molecules - leading to product formation. For this reason, generally speaking, and in the absence of catalysts or extra energy input, a low activation energy reaction is likely to be fast and a high activation energy reaction much slower, reflecting the trend that the lower the energy barrier to a reaction, the more molecules are likely to have sufficient energy to react on collision. I think this has occurred because of the following reason: - - Human error, I probably didn't stop the stopwatch exactly on the 30 Cm3 of Carbon dioxide, or the wrong amount of marble chips added or the wrong amount of acid or water added. Rate is a measurement of the change that happens in a single unit of time. In this reaction, the magnesium and acid are gradually used up. Concentration Pressure for gases 3. When gases or liquids are heated the particles gain kinetic energy and on average move faster see diagrams below.

Safety - Wearing goggles: to stop any acid reaching or splashing in my eyes. BUT, the energy bill should not be economically demanding, the speed of reaction at higher temperature must be under control and not too fast to be dangerous, if the reaction is exothermic and an equilibrium is formed, operating at too high a temperature might significantly reduce the yield.

marble chips and hydrochloric acid experiment write up

Therefore, my hypothesis is: the reaction will be faster when using small …show more content… This increased the accuracy of the obtained results.

Pour the acid into the cm3 conical flask. Continue timing until no more gas appears to be given off.

Chemistry coursework rate of reaction marble chips

The lowest concentration of acid is 10 Cm3, and the rate is very slow on this certain concentration. The increased speed increases the chance frequency of collision between reactant molecules and the rate of reaction increases. These require longer answers than the structured questions. Before the preliminary test I decided that I would use 5g of marble chips, as it seemed a suitable amount. Were my results accurate? Clean if necessary by rubbing lengths of the ribbon with fine sandpaper to remove the layer of oxidation. General Standard I think that my observations and measurements were very good because I had a lot of pre experiment preparation including the preliminary time I was given so that I could practice my experiment. Sample question 1 - Foundation Question Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. Catalyst 4. It is this increased chance of a 'successful' or 'fruitful' higher energy collision leading to product formation, that is the major factor, and this effect increases more than the increased frequency of particle collision, for a similar rise in temperature. I predict that when I increase the concentration, the rate of the reaction will increase. Could you do any further work to get more evidence? I think that I could use a different variable, such as temperature, or surface area etc.

Syringes should not be allowed to become wet, or the plungers will stick inside the barrels. This again can be explained by the collision theory.

The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph. Before the preliminary test I decided that I would use 5g of marble chips, as it seemed a suitable amount.

Rate of reaction mass loss experiment

Continue timing until no more gas appears to be given off. General Standard I think that my observations and measurements were very good because I had a lot of pre experiment preparation including the preliminary time I was given so that I could practice my experiment. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Why does a reaction go faster at a higher temperature? The higher the concentration of acid, the quicker the rate of reaction. Safety - Wearing goggles: to stop any acid reaching or splashing in my eyes. Sample question 1 - Foundation Question Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The lowest concentration of acid is 10 Cm3, and the rate is very slow on this certain concentration. The line which represented the amount of gas given off on the graph was steeper in the test using powder therefore the gas was produced at a faster rate. These are the kind of results I expect to approximately get, on the day of the experiment. The rate of a chemical reaction is how fast the reactants react. Now 'hotter' molecules have a greater average kinetic energy, and so at higher temperatures, a greater proportion of them have the required activation energy to react i. Predict and explain the effect of using smaller marble chips on the reaction rate. Therefore, my hypothesis is: the reaction will be faster when using small …show more content… This increased the accuracy of the obtained results.

It is this increased chance of a 'successful' or 'fruitful' higher energy collision leading to product formation, that is the major factor, and this effect increases more than the increased frequency of particle collision, for a similar rise in temperature. Sample question 1 - Foundation Question Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas.

Calcium carbonate and hydrochloric acid lab report

As I repeated the experiment 3 times and worked out the average rate of reaction in each test, I think my results are quite reliable. I think From looking at the graph you can see that it follows a similar shape to the others except for the reading for the concentration of acid at 30 Cm3, as I have said earlier I think that this is an anomalous result, because the reading should have been less than what it is, the reading now has the same rate of reaction as the 40 Cm3 of acid which is wrong as 30 Cm3 of acid is of a lower concentration than 40 Cm3, and therefore less chance of collisions. These questions bring together ideas from two or more topics. From this time I had been given to practice, I made sure before the real experiment that I had prepared everything properly so that on the day I wouldn't have to worry about things, if I was doing them correctly, and because of the previous experience I knew what to look out for aswell. These are the kind of results I expect to approximately get, on the day of the experiment. I could also increase the amount of Calcium Carbonate to more than 2g and keep the. I also said the lower the concentration the slower the rate, and my results show this aswell. Clean if necessary by rubbing lengths of the ribbon with fine sandpaper to remove the layer of oxidation. There is some acceleration of the reaction rate due to the rise in temperature. Half fill the trough or bowl with water. Though low hazard, eye protection is necessary as you may get a spray as tiny bubbles burst.

However, the average increase in particle kinetic energy caused by the absorbed heat means that a much greater proportion of the reactant molecules now has the minimum or activation energy to react. Corks are too porous and will leak.

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Rates of Reaction