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effect of concentration on rate of reaction
effect of concentration on rate of reaction
effects of changing reactant concentration on rate of reaction discussion lab report
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Recommended: effect of concentration on rate of reaction
In this experiment I intend to investigate the effects of the concentration
of reactants on rate of reaction.
Planning
In this experiment I intend to investigate the effects of the
concentration of reactants on rate of reaction. Specifically I will
investigate what effect varying the concentration of hydrochloric acid
has when it is reacted with sodium thiosulphate. The details of how a
reaction works on a molecular level are described by the collision
theory.
The collision theory explains the circumstances under which
collisions between the particles of the reactants involved in a
reaction must collide, in order for a reaction to occur. In order to
react, the individual particles of a reactant must not only collide in
the correct orientation (as explained in the diagram below), but must
also collide with sufficient energy. When both of these are achieved,
the collision is strong enough to break any existing bonds and form
new ones. The minimum amount of energy required in a collision for two
particles to react is called the activation energy, and varies
according to the reactants. Thus, not all collisions are successful in
inducing a reaction; those that do succeed are called fruitful
collisions.
The more fruitful collisions there are in a reaction, the higher the
rate of reaction will be. Rate of reaction may be measured by
observing the speed with which a product of the reaction is produced.
Where a gas is produced it can be measured in one of three ways. By
forcing it to pass through a cylinder of water, we can measure the
amount of water it displaces, and therefore its volume. Similarly, we
can measure its volume using a gas syringe fitted to the top of the
container in which the reaction is taking place. Alternatively, we can
measure the weight that the container and its contents lose as the
reaction's product is given off, this being proportional to the volume
of the product itself. In each of these examples, the reaction is
timed until it has completely finished. When the volume of the
products given off is plotted against the time taken in a graph, the
gradient of the line denotes the speed of the reaction.
Mathematically, rate of reaction can be expressed as follows:
Reaction rate = Change in the amount of substance
Time taken
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If the products are not gases though, methods of observation may be
employed to measure rate of reaction. Some products will cause a
substance created in a reaction to become cloudy. The production of
this precipitate could be measured and timed, although in this case
accuracy becomes more difficult as the product remains in the
CL-, as the ions of H+ and OH- react to form H2O. These spectator ions
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
Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction
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.
have decided what size chips I I'm going to use I will keep the same
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.
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.
« Surface Area - If the reactant has a large surface area, there is a
The best way to measure gasses is by creating a closed system for an experiment
The Effect of Temperature on the Rate of a Chemical Reaction Aim: In this investigation we are trying to find out how the temperature affects the rate of reaction. Hypothesis: I believe that the higher the temperature, the faster the reaction the reaction between the sodium thiosulphate and hydrochloric acid. This will happen because kinetic energy and the heat energy makes the particles move faster, collide faster and react faster; therefore they can break bonds easier. Scientific Knowledge: Firstly, I will explain the equation needed to follow out the experiment: [IMAGE]Na2 S2O 3(aq) + 2HCL(aq) 2NaCl(aq) +SO2 (g)+ H2O (l)+S(s)
The Effect of Acid Concentration on the Rate of Reaction Introduction: We are going to investigate the effect of Acid Concentration on the Rate of Chemical Reaction. We are going to use the combination of Hydrochloric Acid and Calcium Carbonate as the reactants: [IMAGE][IMAGE] [IMAGE]Calcium Carbonate + Hydrochloric Acid Calcium Chloride + Water + Carbon Dioxide Prediction I predict that the greater the concentration of acid the greater the rate of chemical reaction i.e. the rate of reaction will be directly proportional to the concentration of acid. This means that if I were to double the concentration of acid the rate of reaction would also double, halving the time taken. In order to generate a more accurate picture I have constructed a series of graphs highlighting my above statements. I have used a relative scale, following my prediction, in order to calculate the rate and therefore time taken.
The effect of concentration on the rate of reaction between sodium thiosulphate and dilute hydrochloric acid
that the rate of reaction must be fast enough to make as much of the
Rate of Reaction Investigation Aim: To determine how changing the concentration of a reactant (Na S O ) affects the rate of the reaction. Prediction: I predict that when we increase the concentration, the rate will increase; therefore there are more particles and a greater probability of a collision. If more particles are present in the same volume, they will be closer together. This means they have a higher probability of colliding and speeding up the reaction. If we double the concentration, the rate will also double.