26785662
Description
Flashcards by Charlotte Colton, updated more than 1 year ago
|
Created by Charlotte Colton
over 3 years ago
|
|
| Question | Answer |
|
Practical Methods for Measuring Rate:
Measuring the time taken for a reaction by collecting the gas produced
Image:
Image (binary/octet-stream)
|
When a reaction produces a GAS the gas travels along the DELIVERY TUBE and pushes the PLUNGER of the GAS SYRINGE. When the reaction is FINISHED the time is recorded and the rate can be calculated. |
|
Measure the Rate of a Chemical Reaction by Collecting the Gas Produced
Image:
Image (binary/octet-stream)
|
In this experiment a gas is being produced. The gas escapes through the cotton wool plug which is there to prevent any of the liquids from speaking out. As the gas escapes the mass of the conical flask and it's content decreases. By measuring the time taken to lose a certain rate the mass can be calculated. |
|
Measuring the time it takes for a solid to appear: Precipitation Reaction
Image:
Image (binary/octet-stream)
|
In this experiment a yellow solid is formed. So when the reaction is finished, it is no longer possible to see the ❌ on the piece of paper underneath whilst looking through the top of the conical flask. Rate can be calculated by how long it takes for the ❌ to disappear. |
| Factors that affect the rate of a chemical reaction | -Temperature -Concentration of a solution -Pressure of a gas -Surface area to volume ratio of a solid -A catalyst |
|
Temperature
Image:
Image (binary/octet-stream)
|
The rate of reaction will INCREASE when the temperature INCREASES because the particles will move FASTER and with more ENERGY. This will lead to more successful collisions per time. |
|
Concentration of a solution
Image:
Image (binary/octet-stream)
|
If a solution is more concentrated there are more particles in the same volume. They are CLOSER together and hence there are more SUCCESSFUL COLLISIONS over a certain PERIOD OF TIME |
|
Pressure of a gas
Image:
Image (binary/octet-stream)
|
If the pressure of has as is increased the PARTICLES are pushed CLOSER TOGETHER. This means there are more successful collisions over a period of time. |
|
Surface Area to volume ratio of a solid
Image:
Image (binary/octet-stream)
|
If the surface area of a solid is increased by using a prefer or smaller pieces (increasing the surface area to volume ratio) then the rate of the reaction will increase because there would be more particles exposed for more SUCCESSFUL COLLISIONS over a certain period of time. |
|
Catalyst
Image:
Image (binary/octet-stream)
|
Some reaction rates can be increased using a catalyst. "A catalyst increases the rate of a reaction by lowering the required activation energy. It does not get used up itself." |
Want to create your own Flashcards for free with GoConqr? Learn more.