Rate of Reaction Flashcards

What are homogeneous catalysts

Catalysts that are the same state of matter as the reactants

What are heterogeneous catalysts

Catalysts that are a different state of matter from the reactants

What is a biological catalyst

Enzymes

What form do catalysts typically come in

Transition metals

What is a catalyst 

A substance that speeds up a reaction 

What did we find out the concentrations experiment

The higher the concentration, the more particles there will be buzzing around and therefore more collisions and more reactions.

How did we do the experiment for concentration

We put equal amounts of thiosulphate and acid in a beaker. Gradually, we increase the amounts of acid and thiosulphate in the beaker. 

How does temperature affect rate of reaction

the higher the temperature the faster the reaction. This is because the heat has the particles moving faster and therefore more collisions. 

How did we do the temperature experiment

We got different temperatures of acids and added it to a reactant. We placed it in a beaker and waited for it to turn cloudy and murky stopping us from seeing the X underneath. Once the X was gone, we said that the reaction has finished 

What did we find in the experiment with particle size

We found that the smaller particles take less time than the bigger particles. This is because there is more surface area for it to react with. 

How did we do in the particle size experiment

We out small particles inside a beaker a beaker of acid and used a measuring cylinder to find out the volume. We were waiting for the reaction to stop.

In the mass of gas experiment how could we tell that the reaction has stopped

The popping has stopped and the results were the same as last time 

How did we find the mass of gas 

We got a beaker and put some acid in it. Place it on a scale and put the marble chips inside. A gas will be created, (CO2) as it will be taken out of the beaker the overall mass will decrease, we subtract it from its original state, giving us the mass of the gas. 

What is the formula for average rate

Change in quantity/Change in time

from looking at a graph how can could we tell that the experiment has stopped 

When the line has gone flat and it neither descends or ascends 

In the tub of water and measuring tube experiment, how could we tell that the experiment was done 


The bubbles in the test tube stop coming leaving the volume in the measuring cylinder to go flat

How do you find the volume of gas


You must first have a full measuring tube of water then you must turn it upside down in a tray of water making sure not to lose any. Insert a tube connected to a test tube of acid and marble chips. Once you put the marble chips inside, a gas is produced. The gas will move through the tube and replace the water in the tube with gas, telling us the volume. Please note that this only works if the gas is insoluble.