Chemical Reaction and Copper Sulphate Essay

Submitted By lauren_headd
Words: 2008
Pages: 9

Introduction.
There are many factors that affect the rate of reaction which include:
Concentration
Temperature
Use of Catalyst
Surface area
Temperature:
When you raise the temperature of an element, the molecules bounce around a lot more and give them more energy. When they bounce around more and have more energy, they are more likely to collide. That fact means they are also more likely to combine and react together. When you lower the temperature, the molecules are slower and bump into one another a lot less. That temperature drop lowers the rate of the reaction. http://www.chem4kids.com/files/react_rates.html Concentration:
If there is more of a substance in a structure, there is a higher chance that molecules will clash and speed up the rate of the reaction. If there is less of something, there will be fewer clashes and the reaction will probably happen at a gradual speed. http://www.chem4kids.com/files/react_rates.html Surface Area:
As the surface area of the reactants increases, the reaction rate increases. Increasing the surface area of the reactants results in a greater number of reaction sites (specific sites on molecules at which reactions occur).
Increasing the number of reaction sites increases the number of total collisions. The greater the frequency of total collisions, the greater the frequency of effective collisions. If the frequency of effective collisions increases, so does the reaction rate. https://www.chem.tamu.edu/class/majors/tutorialnotefiles/factors.htm Catalysts:
Catalysts are substances that increase the reaction rate without themselves being changed at the end of the reaction. They increase the reaction rate by lowering the activation energy for the reaction.

Catalysts lower the activation energy of a reaction in one of two ways:
•Providing a surface and orientation
•Providing an alternative series of steps for the reaction to go through with a lower activation energy

Hypothesis:
For the reaction of zinc powder and copper sulphate, there are many things that influence the rate of reaction and the amount of energy released. The=energy released is measured as a change in temperature. By increasing the concentration of the zinc, we should see an increase in the temperature change. As we increase the amount of zinc, the zinc particles will collide with the copper sulphate to form a collision which will increase the temperature of our solution. The more zinc powder we add, the higher the temperature change of the solution we will get. The two reactants, zinc and copper sulphate, will collide together and energy will be released in the form of heat.
Prediction:
predict that the more zinc powder added to copper sulphate will increase the temperature change of the solution. I think this will happen because the more zinc powder added, more collisions with the copper sulphate will happen so the heat change of the reaction will increase. The heat will increase by more zinc being added.
Risk Assessment.
The fire extinguisher is located by the classroom door, along with the fire blanket.
The eye wash is at the back of the room by the sink.
The broken glass bin is also located by the sink.
Emergency exit is located next to the whiteboard behind the teacher’s desk.
First Aid Kit is located in the science office across the hall.
First Aider Mrs Flack In student reception. Contact on 102 using the phone in the science office.
Report any accident/spillage/breakage to your teacher.

Zinc Hazard (power)
Highly flammable
Dangerous for the environment
Contact with water gives off a highly flammable gas
Very toxic to aquatic animals
Reducing the risk
Wear eye protection
Wash hands- wash station available at back of classroom.
Dispose of chemicals correctly using a registered waste carrier.
Copper Sulfate
Harmful/ dangerous for the environment
Harmful if swallowed
Irritating to eyes and skin
Very toxic to aquatic organisms
Reducing the risk
Wear eye protection
Wash hands
Dispose of correctly by either…