It sounds like you're conducting a series of experiments to understand how different variables affect the rate of a chemical reaction. Let's break down the options for each of the conditions based on your observations:
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Control
- Increase Temperature: All A + B react to form C
- Decrease Temperature: Particles collide slower (lower slope)
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Decrease Temperature
- Decrease Temperature: Particles collide slower (lower slope)
- Increase Temperature: Particles collide faster (steeper slope)
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Increase Temperature
- Increase Temperature: Particles collide faster (steeper slope)
- Decrease Temperature: Some reactants remain; only some product is formed
-
Decrease Concentration
- Decrease Concentration: Some reactants remain; only some product is formed
- Increase Concentration: All A + B react to form C
-
Increase Concentration
- Increase Concentration: All A + B react to form C
- Decrease Concentration: Particles collide slower (lower slope)
-
Decrease Surface Area
- Decrease Surface Area: Some reactants remain; only some product is formed
- Increase Surface Area: Particles collide slower (lower slope)
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Increase Surface Area
- Increase Surface Area: Particles collide faster (steeper slope)
- Decrease Surface Area: All A + B react to form C
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Add Catalyst
- Add Catalyst: Particles collide faster (steeper slope)
- Decrease Temperature: Some reactants remain; only some product is formed
These options should align with the typical effects of changes in temperature, concentration, surface area, and the addition of a catalyst on the rate of a chemical reaction. Make sure you verify each selection based on your actual observations from the experimentation.