Marble chip investigation - rates of reaction, studying the effects of change in concentration of the acid
Marble Chip Investigation
Method
1.Set up the equipment as diagram shows. The measuring cylinder must be filled with water and then inverted into the tub.
2.Measure the quantity of hydrochloric acid and marble chips to the decided amount. Add water to the acid to change the concentration to what you need.
3.Take note of the amount of water in the measuring cylinder.
4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch.
5.Once the decided amount of time has passed, take note of the remaining amount of water in the measuring cylinder. Subtract this number from the one noted down in step three, this is the volume of gas produced.
6.Repeat experiment with at least 5 different concentrations of acid.
Equipment
稭arble chips
稨ydrochloric acid
稭easuring cylinder
稢onical flask
稡ung and delivery tube
稢lamp stand
稡oss head clamp
稵ub
稴topwatch
Safety
Hydrochloric acid is very corrosive, so care will be taken when handling it. Safety goggles will be worn throughout the investigation as the reaction could fizz violently and cause eye damage if it was to spit.
Variables
稵emperature
稢oncentration of acid
稴urface area of marble chips
稭ass of marble chips
稸olume of acid
Key Variable
The only variable that I will intentionally change during the investigation will be the concentration of acid. I will do my best to keep the other variables constant.
Measurements
After carrying out the preliminary tests, the measurement I will be using are:
�0cm3 of each acid concentration
� of marble chips
The concentrations of acid that I will use will be:
�
�6M
�2M
�8M
�4M
Fair Test
To make it a fair test and make my results more accurate I will try and keep all variables constant except the concentration of the acid. This will include weighing the marble chips every time and trying to use lumps of roughly the same size to keep the surface area fairly constant as a change in surface area will affect the
Method
1.Set up the equipment as diagram shows. The measuring cylinder must be filled with water and then inverted into the tub.
2.Measure the quantity of hydrochloric acid and marble chips to the decided amount. Add water to the acid to change the concentration to what you need.
3.Take note of the amount of water in the measuring cylinder.
4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch.
5.Once the decided amount of time has passed, take note of the remaining amount of water in the measuring cylinder. Subtract this number from the one noted down in step three, this is the volume of gas produced.
6.Repeat experiment with at least 5 different concentrations of acid.
Equipment
稭arble chips
稨ydrochloric acid
稭easuring cylinder
稢onical flask
稡ung and delivery tube
稢lamp stand
稡oss head clamp
稵ub
稴topwatch
Safety
Hydrochloric acid is very corrosive, so care will be taken when handling it. Safety goggles will be worn throughout the investigation as the reaction could fizz violently and cause eye damage if it was to spit.
Variables
稵emperature
稢oncentration of acid
稴urface area of marble chips
稭ass of marble chips
稸olume of acid
Key Variable
The only variable that I will intentionally change during the investigation will be the concentration of acid. I will do my best to keep the other variables constant.
Measurements
After carrying out the preliminary tests, the measurement I will be using are:
�0cm3 of each acid concentration
� of marble chips
The concentrations of acid that I will use will be:
�
�6M
�2M
�8M
�4M
Fair Test
To make it a fair test and make my results more accurate I will try and keep all variables constant except the concentration of the acid. This will include weighing the marble chips every time and trying to use lumps of roughly the same size to keep the surface area fairly constant as a change in surface area will affect the