Why increasing in temperature of the reactants can increase rate of reaction?
increase collision between the particles thus increasing the rate.
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20
What is the unit of concentration?
mol/dm3
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20
To slow down a chemical reaction you will do one of the following:
Place the reactants in hot water
Place the products in ice bath
Place the reactants in a ice bath
Keep stirring the reactants with a stirring rod
Place the reactants in a ice bath
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The ______________is minimum energy required to make a successful collision between each particle.
Activation energy
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15
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
surface area
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15
Which is the highest concentration?
10m
2M
25 mmol
0.5M
2 M
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15
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
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15
Which changes decrease the rate of reaction between magnesium and air?
1 heating the magnesium to a higher temperature
2 using a higher proportion of oxygen in the air
3 using magnesium ribbon instead of powdered magnesium
3 using magnesium ribbon instead of powdered magnesium
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20
The major theory of reaction rate is called
Collision theory
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How could we make this reaction happen more quickly?
This is reaction between an acid and chalk.
crush the chalk to increase the surface area
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20
When surface area is decreased the rate of reaction...
Decreases, because there are LESS possible sites for correct collisions
