Reaction rate

collision theory states that reactions are produced by the collision of particles. Frequent collisions produce a faster reaction time and release greater energy. This energy is converted into heat and therefore the temperature can be measured. There are many factors that can increase the reactivity of an element when mixed with hydrochloric acid. These include pressure, temperature, surface area and concentration. The atmospheric pressure of a room affects the reaction rate as it forces the particles

Chemical reactions hardly ever complete at a definite end point. Instead, they reach a state of equilibrium at a given temperature where the rate of the forward reaction equals the rate of the reverse reaction. This point of equilibrium is known as the Keq value and can be defined as the ratio of the concentration of products to the concentration of reactants at equilibrium. The value of the equilibrium constant also suggests whether the equilibrium favors the products or reactants. A Keq value larger

this experiment was that an increase in concentration will increase the rate of reaction by decreasing the time taken for the colour change to occur. Figure 1.1 shows time on the x axis and concentration on the y axis, it can be seen that as [reactant] decreases, time increases.Thus, the results correlate with the hypothesis that an increase in concentration will produce a faster reaction time and subsequently a larger reaction rate - regardless of change in [KIO3] or [Na2S2O5], both reactants produce

condition will affect how fast a chemical reaction happens. “Energy is defined as the capacity to perform work. Work is performed when an object is moved against an opposing force, such as gravity or friction. Put another way, energy is the capacity to rearrange matter (Campbell, Reece, Taylor, Simon, 2006). With that being said, life depends on the fact that energy can be converted from one form to another (Campbell, Reece, Taylor, Simon, 2006). A chemical reaction is an example of this, in order for

A clock reaction is one of the most visually effective reactions that can occur within a laboratory. The landolt iodine clock reaction in particular shows a striking transformation that occurs when two colourless solutions are added together and, after a time, the solution changes to a deep indigo-blue. Clock reactions are very versatile when it comes to varying factors that allow for investigation into what impacts rates of reaction. Rates of reaction measure the speed of any change that occurs

effect of Hydrochloric Acid volume with Sodium Thiosulphate on the reaction rate. Introduction: Research Question: How does changing the volume of Hydrochloric Acid on Sodium Thiosulphate effect the time taken for the ‘X’ Mark to dissapear? The rate of a chemical reaction is the time required for a given quantity of reactant to be changed to product. The unit of time may be seconds, minutes, hours, days or years. For a chemical reaction to occur it needs to have a collision, and it is affected by several

the rate of a reaction. The reaction that was tested, used the combination of a potassium starch solution mixed with a sodium solution, commonly known as the ‘Iodine Clock Reaction’. The two clear solutions are mixed together, which after a given time will form a dark blue solution. The factors used in this investigation are the concentration of two substances and the temperature at which the reaction occurred. BACKGROUND INFORMATION Kinetics is essentially the study of reaction rates and

The Hydrogen Peroxide Iodine Clock can be used to demonstrate the above rates of reaction that lead to chemical equilibrium and explore also the impact of concentration of reactants and temperature on rates. In this experiment, hydrogen peroxide and sulphuric acid are added to a another solution of potassium iodide, sodium thiosulphate and starch. After a lag, the combined solution turns a deep blue colour. The reactions occurring are as follows. (1) 3I-(aq)+H2O2 (aq)+2H+I3-(aq)+2H2O(l)

The Effect of Catalyst an the Rate Of Reaction Chemistry Coursework Does The Number of Drops of Catalyst Effect The Rate Of Reaction Candidate Name: Ben Dodds Candidate Number: 7158 School: Oundle School Completion Date: Introduction We are studying the reaction between zinc and sulphuric acid, the reaction is catalysed by copper sulphate and this experiment is to test whether the amount of drops effect the rate of reaction. Word Equation Zinc(s) + Sulphuric acid(aq) à Hydrogen(g) + Zinc

Rate of Reaction Between Marble Chips and Hydrochloric Acid To investigate the factors which affect the rate of reaction between marble chips and hydrochloric acid, with one in specific detail. Scientific knowledge: Marble chips erode when they are exposed to acid rain or pollution. Erosion is evident when you look at older marble buildings as in certain cases the erosion take a long time. It is more likely to occur in areas, where there is more pollution. This is because there are