the rate of reaction between calcium carbonate and hydrochloric acid

This website was used on October 3, 2014 to help develop a better understanding of collision theory in order to explain the various factors affecting the rate of reaction.

To examine how the concentration of hydrochloric acid affects the rate at which it reacts with chalk.

Introduction: The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second. (Chem for Kids, 2016). Reactions require collisions between reactant molecules or atoms. The formation of bonds requires atoms to come close to one another. New bonds can form only if the atoms are close enough together to share electron. Higher temperatures make the collisions between molecules more violent. The higher temperatures mean higher velocities. This means there will be less time between collisions. The frequency of collisions will increase. (Chem, 1999) H2O2 is the chemical formula for hydrogen peroxide. The decomposition of hydrogen peroxide will break down into oxygen and water.

Many factors effect reaction rates, two shown above include temperature and concentration. Concentration affects the rate of reactions because the more concentrated a solution the more likely collisions between particles will be. This is simply because there are more particles present to collide with each other. When the temperature is higher, particles will

The term concentration refers to the amount of a substance present in a certain volume of liquid or gas. Increasing the concentration of the reactants will increase the rate of the reaction. If the concentration of a reactant in a solution is increased, there will be a greater number of particles in a given volume of solution. This means the particles are more likely to collide and therefore react when there are more of them. Collisions between particles are necessary for the reactants to rearrange and form the products. In this experiment, the rate of the reaction between magnesium ribbon and hydrochloric acid will be increased by adding a higher concentration of hydrochloric acid each time. The chemical equation between magnesium ribbon and hydrochloric acid can be written as:

9. Does temperature have any effect on reaction rate? If so, why does it occur?

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Marble, or calcium carbonate, is a fairly insoluble compound with the chemical formula CaCO3. This compound has a carbonate ion, which has a charge of -2 and a calcium ion, which has a charge of +2. Calcium carbonate has a few forms including chalk and limestone. The main use of these two materials is in the making of concrete, which is used for many things including buildings. The rate of the reaction is the speed that the reaction takes place; therefore, by measuring the rate, the amount of time the reaction takes will be measured. Hydrochloric acid is a stronger acid that is found in digestive juices in the human stomach and is also used for cleaning metals before they are coated. When you mix a strong acid like HCl with any carbonate you will have a chemical reaction in which CO2 gas is released. This means that it will fizz indicating a chemical reaction. These two elements can react with hydrochloric acid to yield carbon dioxide, calcium chloride and water. The chemical reaction equation for hydrochloric acid and calcium carbonate is:

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I think that my results will show that the hydrochloric acid with a molarity of 2 will finish reacting the quickest because it is the strongest hydrochloric acid and I predict that the slowest experiment to finish reacting will be the 0.4 molar strength of hydrochloric acid. I think that the results will go slower and slower the nearer they are to the 0.4 strength of hydrochloric acid. The reason that the experiment with hydrochloric acid at 2 molar will dissolve the magnesium ribbon faster is because it is of a stronger concentration and so the molecules in

Substances differs from each other as each of the substances have different atomic composition and structures. And although the substances that shares the same characteristic can be grouped together, each of the substances still have their own unique and defining physical and chemical properties. Therefore, some substances may undergo a chemical change while others don’t during a same reaction. In the experiment conducted, two different elements were used, Iodine crystals, I2 and Copper wire, Cu. After recording the initial observation on both of the elements, they were both heated and allowed to cool.

HCl concluded to be zeroth order but generally reacted faster than Na2S2O3, which was first order. The rate law for this reaction is rate=k[Na2S2O3]. Both reactions, when graphed, showed a straight line though. The average reaction time with HCl was 44 sec (well #1), 53.1 sec (well #2), and 61.2 sec (well #3). Resulting in a reaction rate of 0.012 sec-1 (well #1), 0.019 sec-1 (well #2), and 0.16 sec-1 (well #3). While the average reaction time for Na2S2O3 was 33.4 sec (well #4), 81.48 sec (well #5), and 121.22 sec (well #6). Causing the reaction rate to be 0.03 sec-1 (well #4), 0.012 sec-1 (well #5), and 0.0082 sec-1 (well #6). These results are accurate and can be considered