Rate Of Reaction Flashcards
How do you monitor the rate of reaction
With hydrochloric acid (HCl) and magnesium ribbon (Mg), measure the water change
What is a Neutralisation reaction
A reaction between an acid and an alkali
How do you find the rate of a chemical reaction
The amount of product made or the amount of reactant used up
What is activation energy
The minimum amount of energy required to start a reaction
What is the collision theory
Increasing the energy will increase the:
- kinetic energy
- successful collisions
- frequency of collisions
What are the five factors affecting a reaction
- Concentration
- Temperature
- Catalyst
- Surface area
- Pressure (gases)
What does a higher concentration do to a reaction
- More collisions
- More successful collisions
- More frequent collisions
- Faster rate of reaction
What is a exothermic reaction
A reaction that gives off heat
What is a endothermic reaction
A reaction that takes in heat
What is precipitation
A reaction between two colourless liquids to form a solid
Give an example of precipitation
Sodium thiosulfate + Hydrochloric acid -> Sodium chloride + Sulphur dioxide + Sulphur + Water
Why don’t all collisions between particles result in a chemical reaction
Because sometimes they don’t have enough energy e.g heat
What effect des surface area have on the rate of reaction
- The particles are more exposed to the solution
- More area to react on
Therefore the frequency of collision increases resulting in increase of successful collisions
What is a catalyst and what effect does it have on the rate of a reaction
A catalyst will speed up the rate of a reaction by lowering the activation energy, it gives an alternative pathway for the particles to react on and it doesn’t get used up in a reaction
List 3 catalysts
Hydrogen proxide reacts with
- Potassium Iodide
- Manganese IV oxide
- Liver
- potato
- Copper II chloride
