Variables
Likely impact upon the investigation
How the variable will be changed/measured/controlled
Independent variable
Mass of Baking Soda (grams)
Changing the mass of baking soda will impact the volume of gas is produced. The higher the mass, the more gas will be produced, and vice-versa. This will happen as the results of the decomposition of baking soda will be directly proportional to the mass of the baking soda.
The independent variable will be altered by changing the amount of baking soda heated in increments of 0.2 g as a clear effect of the baking soda on the volume will be evident. An electric balance will be used to measure the mass of the baking soda (±?).
Dependent variable
Volume of Carbon Dioxide Gas (cm3)
Since the goal of this experiment is to find the effect of the mass of baking …show more content…
The clumps of baking soda granules will increase the time it will take for the gas to be released and since we are only heating the baking soda for a certain time, the volume of the gas will be lower than it should be.
When transferring the baking soda into the test tube, it is likely that some of the powder will not go into the test tube, which will cause the volume of the gas to be higher than it should be.
The temperature of the flame will affect the intensity of heat delivered to the baking soda, which will affect the amount of gas released from the decomposition, which may increase or decrease, thus affecting the results of the experiment.
Ensure that a mortar and pestle is used to grind the baking soda to get rid of any clumps that could affect the results of the experiment. Grind the clumps before measuring the powder to ensure accurate measurements will be
Likely impact upon the investigation
How the variable will be changed/measured/controlled
Independent variable
Mass of Baking Soda (grams)
Changing the mass of baking soda will impact the volume of gas is produced. The higher the mass, the more gas will be produced, and vice-versa. This will happen as the results of the decomposition of baking soda will be directly proportional to the mass of the baking soda.
The independent variable will be altered by changing the amount of baking soda heated in increments of 0.2 g as a clear effect of the baking soda on the volume will be evident. An electric balance will be used to measure the mass of the baking soda (±?).
Dependent variable
Volume of Carbon Dioxide Gas (cm3)
Since the goal of this experiment is to find the effect of the mass of baking …show more content…
The clumps of baking soda granules will increase the time it will take for the gas to be released and since we are only heating the baking soda for a certain time, the volume of the gas will be lower than it should be.
When transferring the baking soda into the test tube, it is likely that some of the powder will not go into the test tube, which will cause the volume of the gas to be higher than it should be.
The temperature of the flame will affect the intensity of heat delivered to the baking soda, which will affect the amount of gas released from the decomposition, which may increase or decrease, thus affecting the results of the experiment.
Ensure that a mortar and pestle is used to grind the baking soda to get rid of any clumps that could affect the results of the experiment. Grind the clumps before measuring the powder to ensure accurate measurements will be