Change the Rate of Reaction
Changing the Rate of Reaction
PART 1: PARTICLE SIZE
Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)?
Hypothesis:
If I change the particle size of marble to test how to change the rate of a chemical reaction, than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area, the more place the hydrochloric acid will have to collide with the marble.
Variables:
Independent Variable Dependent Variable Controlled Variables
I will manipulate the particle size of the marble chips.
The different sizes will be:
• Powder (…. mg)
• 0.5 g
• 2.0 g I will count the gas produced per second for each of the independent variables. The following variables will be kept the same throughout my experiments:
• The concentration of the HCl (1.0 mol)
• The amount of HCl (8 ml) per trial
• Total mass of the CaCO3 (2 g)
• The temperature of the reactants
Materials:
• 500 ml beaker
• Tube
• Graduated cylinder
• Test tube
• Stopper
• Tube
• Clamp holder
• Clamps
• Pan balance
• Timer
• Measuring cylinder
• Knife Chemical Compounds:
• HCl: o 71 ml, 1.0 M
• Marble chips o 12 g in solid form o 6 g in powder form
Diagram of Apparatus used to collect the data:
Method:
1. Collect all the materials listed above.
2. Set up the gas collection apparatus as shown above.
3. Measure out 8 ml of HCl with a concentration of 1.0 M using a measuring cylinder and put it into the test tube.
4. Get 2 marble chips, both with a mass of 2 g (prove this using the pan balance). Than take one of these and divide it into 4 equal pieces with the knife. The result should be 4x 0.5 g marble chips.
5. Place the 2.0 g marble chip into the test tube and rapidly close it with the stopper. Count the volume of CO2 gas bubbles produced in 30 seconds
PART 1: PARTICLE SIZE
Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)?
Hypothesis:
If I change the particle size of marble to test how to change the rate of a chemical reaction, than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area, the more place the hydrochloric acid will have to collide with the marble.
Variables:
Independent Variable Dependent Variable Controlled Variables
I will manipulate the particle size of the marble chips.
The different sizes will be:
• Powder (…. mg)
• 0.5 g
• 2.0 g I will count the gas produced per second for each of the independent variables. The following variables will be kept the same throughout my experiments:
• The concentration of the HCl (1.0 mol)
• The amount of HCl (8 ml) per trial
• Total mass of the CaCO3 (2 g)
• The temperature of the reactants
Materials:
• 500 ml beaker
• Tube
• Graduated cylinder
• Test tube
• Stopper
• Tube
• Clamp holder
• Clamps
• Pan balance
• Timer
• Measuring cylinder
• Knife Chemical Compounds:
• HCl: o 71 ml, 1.0 M
• Marble chips o 12 g in solid form o 6 g in powder form
Diagram of Apparatus used to collect the data:
Method:
1. Collect all the materials listed above.
2. Set up the gas collection apparatus as shown above.
3. Measure out 8 ml of HCl with a concentration of 1.0 M using a measuring cylinder and put it into the test tube.
4. Get 2 marble chips, both with a mass of 2 g (prove this using the pan balance). Than take one of these and divide it into 4 equal pieces with the knife. The result should be 4x 0.5 g marble chips.
5. Place the 2.0 g marble chip into the test tube and rapidly close it with the stopper. Count the volume of CO2 gas bubbles produced in 30 seconds