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Experiment magnetism essay
Experiment magnetism essay
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The Determination of a Rate Equation Aim --- The purpose of this experiment is to develop a method to determine the rate equation for the reaction between Magnesium ribbon and 2.0mol dm Hydrochloric acid, HCl. Hypothesis and Theory --------------------- When I react the magnesium ribbon with hydrochloric acid they will undergo the reaction according to the equation below: Mg(s) + 2HCl(aq) à MgCl (aq) + H (g) For a reaction to be successful the molecules must collide with sufficient kinetic energy in order to surmount the energy barrier, also known as the activation energy. When there is an increased concentration of reactants then there is a greater chance of these successful collisions occurring therefore speeding up the reaction (As How far, How fast?). According to the collision theory, I should expect that as I increase the concentration of hydrochloric acid then the reaction rate would also increase because a higher frequency of collisions will increase the rate of reaction. Therefore increasing the time taken for the magnesium to dissolve. When the magnesium ribbon is added to hydrochloric acid effervescence is expected as they begin to react providing me with a reliable method of measuring the reaction rate, hence the time taken for the magnesium wire to completely dissolve. Accuracy measures and Varying Factors ------------------------------------- Ø The length of the magnesium ribbon will have to be kept to 0.03g on each trial. Ø The temperature of the hydrochloric acid should remain constant throughout the trials and each concentration temperature should be checked with a thermometer of 0.5 accuracy. Varying temperatures increase kinetic energy therefore increasing the vibrations and then the frequency of successful collisions. Any variations in temperature may skew results as I am investigating the effect of hydrochloric acid concentration on the rate and not temperature. Ø Start the clock as soon as the magnesium ribbon is added to the hydrochloric acid. Ø Measure solutions as accurately as possible by making sure the
3. The beaker was filled with water and the metal was placed in the water.
Reaction Rate Investigation Planning I am trying to work out the rate of reaction between marble chips (calcium carbonate) and Hydrochloric acid. This will be my plan of how to carry out my investigation. There are many factors, which I could change in this experiment. These are 1) Concentration. An increase in concentration means there are more particles.
being used up, for that is a property of a catalyst is, it speeds up a
Text Box: Surface Area When a solid reacts with a liquid or gas, the surface area of the solid particles makes a difference to the speed of the reaction. From the diagram you can see that the three smaller particles have a larger surface area all together (shown as blue) than the larger particle and so will react faster. There are more calcium carbonate particles on the the concentration of the hydrochloric acid
· We then got a square piece of paper and then placed it on the
one gram of water by 1ºC. I chose to use water because it is safe,
The rate law or rate equation for a chemical reaction is an equation that links the reaction rate with concentrations or pressures of reactants and constant parameters (normally rate coefficients and partial reaction orders).[1] For many reactions the rate is given by a power law such as
I will get all of my 6 different solutions, everytime I use a solution I will measure 10cm3 of it and everytime I will use two pieces of magnesium of length 10mm
On a two pieces of paper, we drew a cross and place a beaker on top of
because I think it will give a wide set of results to put into a
* Amount of acid – if there is more acid the rate of reaction will
from 10cm to 50cm to make it easier to see the difference in a graph.
cloudy, to test this; I will place a piece of paper with a cross on
The Web. The Web. 28 Apr. 2014. The 'Standard' of the 'Standard'. Metal Melting 101 - How To.
The rate of reaction is how quickly or slowly reactants in chemical reactants turn into products. A low reaction rate is when the reaction takes a long time to take place; hence, a reaction that occurs quickly has a high reaction rate. A rate refers to how slow or quick the product is produced. It is possible to control the rate of chemical reactions and speed up or slow down the rate of chemical reactions by altering three main factors which are temperature, concentration and the surface area. When the temperature of the reactants increases, the molecules vibrate at a more intense speed therefore colliding with each other more frequently and with increased energy resulting in a greater rate of reaction. Accordingly, as the temperature decreases the molecules will move slower, colliding less frequently and with decreased energy resulting in the rate of reaction decreasing. Concentration is how much solute is dissolved into a solution and is also a factor that affects the rate of reaction. When the concentration is greater this means there is an increased amount of reactant atoms and molecules resulting in a higher chance that collisions between molecules will occur. A higher collision rate means a higher reaction rate. Consequently at lower concentrations there are reduced chances of the molecules colliding resulting in a lower reaction rate. The measurement of how much an area of a solid is exposed is called the surface area. The quicker a reaction will occur the more finely divided the solid is. For example, a powdered solid will usually have a greater rate of reaction in comparison to a solid lump that contains the same mass for it has a lower surface area than the powdered solid.