To Investigate The Effect Of Varying Concentration On The Reaction Between Marble Chips And Hydrochloric Acid.
To Investigate The Effect Of Varying Concentration On The Reaction Between Marble Chips And Hydrochloric Acid Plan Aim In this investigation I will react marble chips and varying concentrations of Hydrochloric acid and measure the rate of reaction to see what the effect of different concentrations have on the rate of reaction. Equation I already know that carbonates react with acids to produce Water, Carbon Dioxide and a salt: CaCO3(s) + 2HCl(aq) => CO2(g) + CaCl2 (aq) + H2O(l) Method Equipment I will need : * A gas syringe * A bung and tube * A conical flask * Marble chips * Hydrochloric acid (2mol/dm3) * A measuring cylinder * A retort stand and clamp * Beakers * Distilled water * Weighing scales * Weighing boat * Stopwatch I will setup the experiment like this: I know this set-up works because I have previously done an experiment with marble chips in which hydrogen gas was being collected. How I will do it First, I will make the solution. I have chosen to use 80cm3 of acid and 20g of marble. I will make different concentration acid solution by mixing varying amounts of acid and distilled water. I.e. for a one molar solution, I will use 40cm3 of 2 molar acid and 40cm3 of distilled water and so on. I will then put the solution in the conical flask. Then I will add the marble chips, but the bung on, and use the stopwatch to time how long it takes
To investigate how concentration affects the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.
Rates of reaction Aim: To investigate how concentration affects the rate of reaction between Sodium Thiosulphate and Hydrochloric acid. Introduction: I know that the equation for this reaction is: Na2S2O3+ 2HCl ›2NaCl + S + SO2 + H2O This shows me that one of the products in this reaction is Sulphur Dioxide. This means a precipitate will be formed therefore allowing me to time when the experiment is complete. During my experiment I will change the concentration of the Sodium Thiosulphate to allow me to see how concentration affects the rate of reaction. The collision theory states that the more particles (the higher the concentration) the faster the reaction. This is because there are more particles to collide in the reaction causing the change to happen faster. Hypothesis: I think that the higher the concentration of the sodium Thiosulphate the faster the reaction. This is based on the collision theory and my preliminary experiment. I found that the more concentrated the solution the faster the experiment went. Preliminary Summary: I placed a 10cm magnesium strip in 3 different concentrations of Hydrochloric acid. I then calculated how long it took for 100cm of Hydrogen gas to be given off in the shortest time. Here are my results: 0.5 molar - 3 mins for 55cm gas 1 molar - 85.4 seconds for 100ml gas 2 molar - 19.06 seconds for 100ml gas This proves the
What affects the rate of reaction?
Planning (Also see Investigation Planning Sheet.) Background Information I have been set a task to investigate factors which affect rates of reaction, using calcium carbonate and hydrochloric acid. These are good reactants to use, as carbon dioxide (CO2) is produced and this release of gas can be monitored using a gas syringe. Calcium + Hydrochloric Calcium + Water + Carbon carbonate acid chloride dioxide CaCO3 + 2HCl CaCl2 + H2O + CO2 What affects the rate of reaction? Rates of reaction can be explained using the Collision Theory, which has two main principles: * Particles must collide before a reaction can take place. * Particles must collide with enough energy for a reaction to take place. If particles collide and react, then a successful collision has taken place. However, if particles collide, but without enough energy to react, then an unsuccessful collision has taken place. There are four main factors that affect rates of reaction, and these can all be explained by increasing the number of collisions between the reacting particles: * TEMPERATURE increases the rate of reaction. Temperature has two effects in increasing rates of reaction: ) The particles move quicker, causing more collisions per second. 2) The particles have more
What factors affect the rate at which hydrochloric acid reacts with sodium thiosulphate?
What factors affect the rate at which hydrochloric acid reacts with sodium thiosulphate? Planning This investigation is about rates of reaction and what affects them. In this case I am going to look at hydrochloric acid and sodium thiosulphate which is a precipitation reaction. They react as in the equations below: sodium thiosulphate + hydrochloric acid -> sodium chloride + sulphur + sulphur dioxide + water Na2S2O3(aq) + 2HCl(aq) -> 2NaCl(aq) + S(s) + SO2(g) + H2O(l) A reaction will only occur where the particles of the reactants meet and combine. This is called the collision theory. Therefore it stands to reason that to increase the rate of reaction it is necessary to cause more particles to collide harder and make it happen more often. There are several ways to do this and these make up the variables for this experiment. They are listed below along with predictions as to their affect on the reaction. . Increasing the pressure. By reducing the volume in which the same amount of particles exist the pressure is increased. Once the same number of particles are in a smaller area there is less space in which to move and so the particles are more likely to hit each other. It is therefore possible to predict that increasing the pressure will result in an increase in the rate of reaction. I will not test this variable because the school doesn't have the facilities to test it.
Yeast respiration.
Yeast respiration The possible factors that could affect the reaction are the temperature at which the reaction takes place. The concentration of hydrogen peroxide used, the volume of the hydrogen peroxide used and the area of the catalase that is exposed to the hydrogen peroxide, when the mass of the potato is kept the same. The temperature at which the reaction takes place affects the reaction, as when the temperature is increased the rte of reaction is also increased until the temperature reaches 40 degrees centigrade and he enzymes are denatured. The concentration of H2O2 affects the reaction as when the concentration is increased the reaction is also increased a there is more chance of collision with a higher concentration. The volume of H2O2 used affects the reaction as, when there is more H202 to react with the rate of reaction will take longer because the catalase will have to catylise more H202. When the volume of H202 is increased the rate of reaction decreases. The area of potato that is exposed to the hydrogen peroxide, when increased, increases the rate of reaction also when the mass is kept the same. The mass also affects the rate of reaction; when the mass is increased the rate also increases. PH affects the reaction as enzymes only work at certain pH's, which are specific to the enzyme. I have chosen to investigate how changing the exposed surface
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