Investigating Factors Which Affect The Reaction Between Chalk and An Acid Introduction: Chalk is just one of many forms that calcium carbonate can take. It is made of the mineral remains of sea creatures from millions of years ago. It is quite soft, but solid. It reacts with hydrochloric acid like this 2 CaCO3 + 2 HCl → CO2 + CaCl2 + H2O producing Carbon Dioxide, which is what we measure in the experiment. There are different factors affecting the rate of this reaction, such as: * Temperature * Concentration of acid * Surface area of chalk * Pressure * Light intensity (this is a very small affect so it doesn't really count and I won't take it into account) * Whether a catalyst is present (in this experiment there isn't one anyway) (Note these factors affect the rate of the reaction, but not the final amount of carbon dioxide produced.) Why these factors affect it: higher temperature makes atoms move more so they are more likely to bump into each other and react. The more concentration or more volume there is of an acid, the more acid molecules there are that can react with the chalk. The larger the surface area of a solid, the more surface there is for acid to collide with and react with. Higher pressure pushes the molecules closer together, so it's quicker for them to collide with each other and therefore react (so raising the pressure is like raising the concentration). Every reaction needs a little "activation energy" to make it happen, and when catalysts are added they reduce the amount of activation energy needed. I have chosen to do concentration of acid because surface area is difficult to measure, pressure is hard to do in a school lab, and temperature could be dangerous e.g. if acid boils it could spit. Prediction: I predict that as I strengthen the acid (increase molarity) the
Investigating the Rate of Reaction Between Marble Chips and Hydrochloric Acid I am investigating the rate of reaction between marble chips (calcium
limestone chips, I will use 3g all the time and use 2 moles of acid.
I think this because as the surface area increases, the speed of the reaction will increase therefore the gas will be produced faster. I believe this because most chemical reactions happen faster when there is more of the reactant to react with. When there is a larger surface area, there is more of the reactant available, which makes it easier for them to react together. Usually, when the surface area is doubled it will double the rate of reaction.
Temperature increases the rate of reaction between molecules; this will have a profound impact on the rate of respiration. Rate is determined on how fast something is being consumed in a reaction, or how fast something is being crated. The rate of respiration is measured the easiest by the amount of C02 produced by the reaction or by the amount of C02 consumed. The best way to measure gasses is by creating a closed system for an experiment to take place. Consuming oxygen decreases the volume of gas while the production of CO2 increases the production of gas.
As the temperature increases, the movements of molecules also increase. This is the kinetic theory. When the temperature is increased the particles gain more energy and therefore move around faster. This gives the particles more of a chance with other particles and with more force.
Strong heating of calcium carbonate produces calcium oxide, CaO, and carbon dioxide. tlcQeA from tlcQeA coursewrok tlcQeA work tlcQeA info tlcQeA CaCO3(s) à ƒaO (s) + CO2 (g)coce cer sececew orce cek ince foce ce. Limestone is given the equation CaO, slaked lime is produced when CaO reacts with water, this is where further amount of H2O is added which turns this into a saturated aqueous solution known as limewater. Ca(OH)2 (aq) and is used for tests to show the presence of CO2.
• The use of a catalyst will speed up the reaction as long as the catalysts electrode potentials are feasible for each step in the reaction. Since a catalyst lowers the activation energy and takes the reaction through a different route, according to the Maxwell-Boltzmann diagram, at a constant temperature more particles are able to react as demonstrated by the diagrams below:
The Rate of Reaction Between Calcium Carbonate and Hydrochloric Acid Planning. CaCO3 (s) + 2HCl (aq) ---- CaCl2 (aq) + H2O (l) + CO2 The rate of reaction depends on how hard and how often the reacting particles collide with each other. A rate of reaction is how fast a reaction takes place.
Rate of Reaction Between Calcium Carbonate and Hydrochloric Acid Plan: In my experiment I will measure the rate of reaction between calcium carbonate and hydrochloric acid. The rate of the reaction is the speed that the reaction takes place so by measuring the rate I will measure the amount of time the reaction takes. Hydrochloric acid is a strong acid that is found in digestive juices in the stomach, it is also used for cleaning metals before they are coated. 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 such as buildings. When you put calcium carbonate and hydrochloric acid together they react to form calcium chloride, carbon dioxide and water.
The Effect of Temperature on the Rate of Reaction Between Hydrochloric Acid and Calcium Carbonate
It will be when there is too much HCl for the marble chips to dissolve
An investigation into how changing one variable influences the rate of reaction between marble chips and dilute Hydrochloric acid
Investigating the Rate of Reaction Between Marble Chips and Acid Introduction This is a test to demonstrate the reaction rate between marble chips (CaCO) and hydrochloric acid (HCl). Hopefully we will be able to prove that the concentration of the acid is directly proportional to the reaction rate. Aim To discover if the concentration of acid is directly proportional to the rate of reaction, by monitoring the amount of gas given off as the reaction takes place. Prediction We believe that the concentration of the acid will be directly proportional to the rate of reaction. We believe this due to the following theory: [IMAGE]The collision theory: This theory states that for a reaction to occur the reactant particles need to react with sufficient energy.
Investigate how the concentration of hydrochloric acid effects the rate at which it reacts with calcium carbonate
Firstly, we need to keep the chemical at a constant concentration. So, in this experiment we have chosen to keep hydrochloric acid at a constant concentration (5cm3). We could have, however, used Sodium Thiosulphate as a constant, but we had chosen to use Hydrochloric acid. Next, we must make sure that the solution is kept at a constant volume throughout the experiment. If the volume is different, then it could give different results if it was at a constant volume.