Key Experiment Rates of Chemical Reactions
KESC13: Determine the reaction rate for the decomposition of hydrogen peroxide or the reaction between citric acid and bicarbonate of soda.
Curriculum Topics
Chemistry: Chemical reactions: reactants, products and energy change
Chemistry: Rates of chemical reactions
Description
This key experiment investigates reaction rates for a range of chemical reactions under different conditions. Data can be collected to enable investigations of variable relationships.
Principle
The reaction rate can be determined by the increase in gas pressure during a chemical reaction. Assuming the Ideal Gas Law applies the relationship between pressure and moles of gas is directly proportional.
Tasks
In this experiment, you will:
1. Conduct the reaction of citric acid and baking soda.
2. Calculate the rate constant for the reaction.
3. Determine the rate law expression for the reaction.
Ideas for Extended Investigations
1. Investigate rates of reactions for different surface areas of reactants
2. Investigate rates of reaction through rates of change of pH, conductivity, temperature or gas pressure
3. Investigate relationships among pH, conductivity, temperature and rate of gas production during a chemical reaction.
Last edited 30th Apr 2018
Essential items - The following items are required: | From | ||
| LABQ2 - Vernier LabQuest 2 Data Logger and Interface | $835.00 | ||
| GPS-BTA - Vernier Gas Pressure Sensor | $226.00 | ||
| LW1667-01 - Retort Clamp Alloy with Cork Lined Jaws | $10.50 | ||
| SC7323 - Stand Retort Base 250x160mm Rod 700mm | $28.00 | ||
| Optional items - The following items are optional: | From | ||
| LQ-MINI - Vernier LabQuest Mini Data Logger Interface | $455.00 | ||
| LQ-STREAM - Vernier LabQuest Stream Wireless Data Logger | $698.00 | ||
| LP - Vernier Logger Pro 3 Data Logging Software | $719.00 | ||
| PH-BTA - Vernier pH Sensor | $238.00 | ||
| GDX-PH - Vernier Go Direct pH Sensor | $262.00 | ||
| CON-BTA - Vernier Conductivity Probe | $301.00 | ||
| GDX-CON - Vernier Go Direct Conductivity Probe | $310.00 | ||
| GDX-GP - Vernier Go Direct Gas Pressure Sensor | $238.00 | ||
| CHEM-I - Vernier Investigating Chemistry through Inquiry | $125.00 | ||
| STIR - Vernier Stir Station | $370.00 | ||
| CH2093-001 - IEC Magnetic Stirrer Hot Plate Thermostat PTFE Top | $645.00 | ||
| PA3802-005 - IEC Spin Bar 25mm PTFE | $9.20 | ||
The following items are required but are not available from Scientrific: | |||
| Reactants | |||
Documents: Experiment | Chemical Reaction Rates | Experiment | Decomposition Hydrogen Peroxide | | |||||||
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