The Speed of Reaction.

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 atmospheric pressure of a room affects the reaction rate as it forces the particles closer together therefore inducing more collisions. The more energy released from the particles raises the temperature. The higher the concentration of the solutions the more particles there are therefore making it more likely to collide. The surface area can have an influence on the rate of reaction as the element had more exposed surfaces, allowing the reactant to collide with the element.

In this experiment it was observed that not all chemical reactions occur at the same rate. Chemical reactions occur when one or more substances are changed into other substances. The properties of a chemical reaction require three things. First, they need a source of energy for molecules to encounter each other. Second, they require to proceed at a steady rate. Third, they must proceed in a particular direction until they reach equilibrium. There are two types of chemical reactions that can occur: endergonic and exergonic reactions. In these reactions there are both reactants and products. In exergonic reactions the reactants (starting materials of a reaction) are higher than the products (results of a reaction). This is opposite for endergonic

The volume of the Jelly Marbles that sat in the water have a volume of 1.02 milliliters. Trial 1 for the Jelly Marbles in the food coloring had a volume of 1.03 milliliters and trial 2 had a volume of 1.12 milliliters. The volumes for trial 1, 0.17 milliliters, and for trial 2, 0.03 milliliters, has a big difference. The density for the Jelly Marbles that soaked in water was approximately 1.4 milliliters. Trail 1 for the Jelly Marbles soaked in food coloring also had a density of 1.4 milliliters but, trial 2 had a density of 1.25 milliliters. The density for both of the Jelly Marbles that soaked in the 70% rubbing alcohol can not be found.

When an enzyme reacts in a metabolic process the activation energy decreases and the reaction takes place faster.

3. Please refer to the graphs at the beginning of the post-lab and question 2a. The effect of magnesium on a reaction rate depends on the magnesium’s shape and surface area, greater the surface area, the faster the reaction rate.

Rinse out beaker and dry it, preparing for next trial. Also reset stopwatch. Repeat steps 10-16 two more times until you have completed three trials in total. Measure the temperature of the hot water in celsius and record it to ensure consistency in temperature throughout the experiment.

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:

I aim to discover how different concentrations of Hydrochloric acid influence the rates of reaction. In order to carry out this investigation I have decided to use marble chips, which I will vary the sizes as powder, small chips and large chips. I will also be changing the concentration, the different concentrations are as follows 0.2m, 0.5m, 1m, 1.5, 2m. I have chosen these concentrations as they have a good range, we have to take this in to account, in view of the fact that if I was to use a concentration lower than 0.2m, the rate of reaction will be to slow or if I was to use over 2 molars, it is too dangerous to handle and violates

Partners: Robert LOWSLEY-WILLIAMS Magnesium and Hydrochloric acid 1. INTRODUCTION I have been asked to do an experiment on the rates of reactions experiment to see the rates of reactions and come up with a conclusion to why it happens, I will also have one variable which me and Robert have chosen to be the temperatures, we will have the temperatures: 15 °C 30 °C 40 °C 50 °C 60 °C With these results we will compare the results we got from different temperatures to see if there is any particular pattern. 1.1 BACKGROUND INFORMATION For this experiment we will be doing 15 different tests 3 of each different temperatures, and

There are many minor and major factors that could have induced the percent errors that occurred in this experiment. One inevitable factor that may have hindered our results is the air conditioning in the room where the experiment was conducted. The air could have been a minor force that affected the motion of the marble while it was airborne, which ultimately affected its location on the carbon paper. Another possibility is the miscalculations through the photogate and photogate timer. However, the biggest factor that played a role in the inaccuracy of our results is the physics launcher. After years of use, the launchers used in this experiment were not in their best condition. Because of this, the marble may not have been launched as efficiently as it could’ve, which results in a change for the distance traveled and the time the marble was in the air.

In conclusion, the marble that made it to the bottom of the tube the fastest in the substance was isopropyl alcohol. The marble in Isopropyl alcohol took 1.16 seconds to get to the bottom of the tube. Isopropyl alcohol was the fastest because, It contains 1 H and the H bonds with 1 O therefore, it has a less viscosity so the substance is less thick so the molecule travels through the liquid fastest. The second fastest tube was ethylene glycol it has 2 H’s that bond with 2 O’s it has more H bonds then isopropyl alcohol so it has a greater viscosity which means it takes a longer time for the marble to travel through the substance because it’s less liquidy and it took 1.59 seconds. The slowest tube was glycerol. Glycerol has 3 H’s that bond with

When I conduct my experiment I think that as the concentration of HCL increases. The time taken for the HCL to react with Na2S2O3 will increase. I think this will happen because of the collision theory (1) ‘the more collisions in a system, the more likely combinations of molecules will happen.’ This helps understand that if we increase the concentration of HCL then the more likely there will be combination of molecules hitting each other at a faster rate meaning that if there are more collisions of molecules this would speed up a reaction by every molar the HCL goes up by.

enzyme reaches a low temperature the reaction rate slows, as an enzymes temperature rises the

Place one of the two marbles at the top of the ruler (0cm) side, and the other marble exactly at 15cm on the ruler.