C8

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What are the two ways to work out the rate of a chemical reaction?
How quickly the reactants are used up as they make products or the products of the reaction are made
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What is the first technique to measure the rate of a chemical reaction?*
Measure the decreasing mass of a reaction mixture
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What is the second technique to measure the rate of a chemical reaction?*
Measure the increasing volume of a gas given off
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What is the third technique on measuring the rate of a reaction?*
Measure decreasing light through a solution
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Equation for measuring the rate of a reaction?
Mean rate = quantity of reactant or product/ time
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What is the collision theory?
Reacting particles have to collide with energy to cause a reaction
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What is activation energy?
Minimum energy needed for particles to react
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What happens if you increase the SA:V ratio?
Increases frequency of collisions
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How does raising the temp increase rate of reaction?
Collisions more often and with more energy.
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Why is there more collisions in a given time?
A higher proportion of particles have greater energy than the activation energy.
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What happens if you increase the concentration of reactants in a solution?
Increases rate of reaction as more particles moving around in same volume
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What happens if you increase the pressure of reacting gases?
Squashes gas particles are more closely together so increases chance of collision
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How do catalysts work?
They increase the rates of reaction by providing an alternate reaction pathway
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How do catalysts help with industries?
They reduce costs of upgrading to higher pressures and temps.
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What else can catalysts do?
Combat climate change
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What is le chateliers principle?
A change in conditions introduced to a system, position of equil shifts to cancel out change
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What happens when the forward reaction produces more molecules of gas?
An increase in pressure decreases the amount of products formed and a decrease in pressure increases the amount of products formed
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What happens if the forward reaction produces fewer molecules of gas?
An increase in pressure increases the amount of products formed and a decrease in pressure decreases the amount of products formed
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What happens if the forward reaction is exothermic? (Temp)
An increase in temp decreases amount of prodcuts and a decrease in temp increases the amount of products formed
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What happens if the forward reaction is endothermic?
An increase in temp increases amount of product and a decrease in temp increase product
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What happens to favouring if u increase temp?
Favours endo reaction
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What happens to favouring if decrease temp?
Favours exo reaction
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Other cards in this set

Card 2

Front

What is the first technique to measure the rate of a chemical reaction?*

Back

Measure the decreasing mass of a reaction mixture

Card 3

Front

What is the second technique to measure the rate of a chemical reaction?*

Back

Preview of the front of card 3

Card 4

Front

What is the third technique on measuring the rate of a reaction?*

Back

Preview of the front of card 4

Card 5

Front

Equation for measuring the rate of a reaction?

Back

Preview of the front of card 5
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