Concentration of hcl affecting surface area
We can identify five factors that affect the rates of chemical reactions: the chemical nature of the reacting substances, the state of subdivision one large lump versus many small particles of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.
Which reaction should occur at the faster rate?
Threshold kinetic energy is the minimum amount of energy required for colliding particles to react - it is the equivalent of activation energy or the minimum potential energy gain required to form an activated complex.
HCl with zinc coal dust with oxygen gas grain dust with oxygen gas Concentration The concentration of a substance can be expressed in a variety of ways depending on the nature of a substance. Figure 3.
How does concentration affect the rate of reaction
For the reaction of calcium carbonate and hydrochloric acid to produce carbon dioxide and calcium chloride, the carbon dioxide can be collected as well. Conversely, increasing the volume of a gas decreases pressure which in turn decreases the collision frequency and thus reduces the reaction rate. Get Essay To prepare the agar blocks, I used knife and ruler to acquire 5 agar blocks with equal dimensions of 3. With the derived conclusion, it shows that in order for rate of diffusion to be greater, higher concentration of the solution must be used, so that the concentration gradient is steeper. This limitation can affect the time taken for agar blocks to turn pink, followed by the rate of diffusion, as some blocks are bigger while some are smaller than the others. There are few factors that affect the rate of diffusion, the time taken for both regions to have equal amount of particles. Background Information: The more finely divided the solid is, the faster the reaction happens. Methane gas is already in the gas state so it burns faster than wax. As the concentration of HCl increases, the rate of diffusion will also increase due to the steeper concentration gradient created. State of Matter Gases tend to react faster than solids or liquids: It takes energy to separate particles from each other. Apparatus Needed For the Experiments: 1. Limitations Some of the results were not as accurate as it was difficult to see whether the agar blocks have turned entirely pink in colour. Explain why an egg cooks more slowly in boiling water in Denver than in New York City. This way, not only is it convenient, it also helps us acquire the accurate dimensions of the agar blocks, having the same surface area to volume ratio for all the agar blocks. This reaction is very slow.
For example, when small pieces of the metals iron and sodium are exposed to air, the sodium reacts completely with air overnight, whereas the iron is barely affected.
An easier method might be to weigh the reaction container to determine how much carbon dioxide has been given off.
Temperature is set at an air-conditioned room in a Biology lab The agar blocks are cut into same length, same breadth and same height 3. Consider the reaction between hydrochloric acid and zinc metal. Relating this back to the kinetic energy diagram, you see that more particles will have sufficient kinetic energy to react.
Factors affecting the rate of chemical reaction worksheet answers
Reactions involving ionic species tend to proceed faster than reactions involving molecular compounds. When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases. Rates usually increase when the concentration of one or more of the reactants increases. Sometimes the rate of reaction can depend on the concentration of all the reactants, and sometimes catalysts are present and help determine the speed of the reaction. How to cite this page Choose cite format:. There are four main factors which affect the rate of reaction. Need a good analogy for the effect of concentration on the rate of a chemical reaction? In this lesson, you will define these factors, and describe and predict their effects on reaction rates. A catalyst provides an alternative pathway for the reaction - a pathway that has a lower activation energy. Use the Single Collision tab to represent how the collision between monatomic oxygen O and carbon monoxide CO results in the breaking of one bond and the formation of another. Collision Theory is a model of chemical reactions in which a reaction.
Increasing the surface area of a solid reactant increases the reaction rate. This limitation can affect the time taken for agar blocks to turn pink, followed by the rate of diffusion, as some blocks are bigger while some are smaller than the others.
BBC Methodology Table 1. When several reactants are involved, increasing the concentration of one of them may not affect the rate of reaction if not enough of the other reactants is available. Larger multi celled organisms need specialist organs to respire such as lungs or gills.
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