Science Coursework Plan I have been set a task to investigate the rates of reaction. Before I carry out my experiments I will have to draw up a plan to ensure that the experiments are carried out properly. Below is a few things that is essential in a plan: 1) Factors: I must have a factor for everything. 2) Explain Factor: I must explain all of the factors. 3) Explain Concentration: I must explain how much concentration I put in to my investment. 4) Preliminary Experiment: This document describes identified hazards of an experiment and the measures taken to eliminate, control or mitigate them. Particular attention must be paid to the analysis and evaluation of conditions that may pose special safety problems. 5) Hypothesis: I must give a set of evidence for every single step I do to my prove my experiment goes right. 6) Variable - Control variable: I must make sure that it is held constant or whose impact is removed in order to analyze the relationship between other variables without interference, or within subgroups of the control variable. - Independent Variable: I must make sure I have notes of all the things I change. - Dependant Variable: I must make sure keep a good eye on the Independent Variable in order for the dependant variable. Temperature: I must make sure the temperature stays same. In a cold reaction mixture the particles are moving quite slowly, particles will collide with each other less often, with less energy, and fewer collisions will be successful. However, if I heat the reaction mixture the particles will move more quickly, the particles will collide with each other more often. With greater energy, and many more collisions will be successful. Catalyst: A chemical substance that increases the rate of a reaction without being consumed; after the reaction it can potentially be recovered from the reaction mixture chemically unchanged. The catalyst lowers the activation energy required, allowing the reaction to proceed more quickly or at a lower temperature.
Determine the reaction order for Na2S2O3 using calculations described in the Background. Show your work. Note that your answer will probably not be an even whole number as it is in the examples.
It is important however to note that the NH4 and K ions are still in
Investigating Rates of Reactions My aim is to investigate what factors affect the rate of reaction between magnesium and hydrochloric acid. The factor that I will be focusing on is the concentration of Hydrochloric acid. [IMAGE]Reaction Equation: Mg (s) +2HCl (aq) = MgCl2 (aq) +H2 (g)
In this experiment there five different phases and in each a different factor of the Collision Theory was tested. The first phase was called, Nature of the Reactants and it had three parts to it. In the first part of it which was steps 1-4, 5 pieces of mossy zinc were put into 3ml of 2M H_2 〖SO〗_4 and during this time bubbles were produced. After a few minutes the zinc was removed from the acid and it was now clean zinc.
Investigation: How does the concentration of acid affect the rate of reaction? The aim of this investigation is to test how concentration affects the rate of reaction. My prediction for my investigation is that the higher the concentration, the faster the reaction will be.
have decided what size chips I I'm going to use I will keep the same
Experiment is to investigate the rate of reaction between hydrochloric acid and calcium carbonate Hydrochloric acid + Calcium Carbonate Þ Calcium Chloride + Water + Carbon Dioxide 2HCl (aq) CaCo3 (s) CaCl2(s) H2O (aq) CO2 (g) There are a number of variables in this experiment and these are listed below as input variables and outcome variables.
Investigation looking At the Speed of Reactions Introduction The aim of this experiment is to find out how a variable can affect the results from a scenario set up in scientific environment. The experiment is to see how a certain variable will affect the amount of Gas produced from a Calcium Carbonate and Hydrochloric Acid Reaction. The Science Calcium Carbonate is a generally white or colourless mineral that is translucent.
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
Investigating Factors that Affect the Rate of Reaction There are certain factors which affect the rates of reaction in an experiment. These factors are: · Pressure · Temperature · Concentration * Surface area / particle size and * The addition of a catalyst The factors that I will be concentrating on are temperature, concentration and surface area / particle size. Pressure Pressure influences the rate of reaction only when the reactants are in their gas phase. Pressure does not affect them much when they are either solids or liquids.
The Purpose of the Chemical Reaction Lab was to examine and measure the chemical reaction of H-C-L, hydrochloric acid and CuCl2, Copper chloride solution to determine different types of reactions, within specific elements and compounds; Aluminum foil, Al aluminum shot, Ammonium hydroxide, Magnesium, Silver nitrate, Sodium carbonate, Sodium bicarbonate, Sodium hydroxide, and Zinc. By completing the trials, the data displayed chemical changes. These changes were observable in changes of substances, such as formation of precipitate, change in color, release of gas, and difference of temperature.
In order for me to carry out my experiments I would need to change the
Rate of Reaction Experiment - Sodium Thiosulphate and Hydrochloric Acid To investigate the effect, of changing the concentration of a reactant, in a chemical reaction on it rate. The equation used for the experiment was: Sodium + Hydrochloric Sulphur + Sulphur + Sodium + water Thiosulphate acid dioxide chloride Na2S2O3 + 2HCl(aq) S(s) + SO(g) + NaCL(aq) + H2O The Collision Theory can explain reaction rates perfectly.
* Amount of acid – if there is more acid the rate of reaction will
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.