Ability Test- Rates of Reaction (selective)

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  • Created by: Heather
  • Created on: 18-07-14 20:37
What is the rate of reaction?
How fast a particular reaction is going,
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What is the first way to measure the rate of a reaction by measuring gas?
In a reaction that produces gas, like between an acid and an alkali, are put in a beaker and a gas syringe fixed on with a bung to collect gas given. Stopwatch used-records reaction time.At intervals, record how much gas is produced in a graph,
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What is another way to measure the rate of a reaction that loses mass?
In a reaction thag changes mass (if a gas is given off?) the wight of the glass beaker is recorded then the reactants are added and this is weighed before and after the reaction or a regular intervals.
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What is the third way to measure the rate of a reaction that turns cloudy?
If, like calcium hydroxide and carbon dioxice, the raction turns cloudy, then the time taken, with a stop watch, for how long it takes for the mark beneath the glass beaker to be obscured which is the time taken for the reaction to occur
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What is the last way to measure the rate of a reaction?
Some reactions cuase a change in pH or temperature and this can be recorded before and after to provide a difference for how much the pH and temperature has changed using a thermometer or universal indicator.
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What does the rate of the reaction depend on involing particles?
The faster the particles of the reactants collide, the more frewuently so faster the products will be produced, However, they need the right activation energy,
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What five factors will increase the rate of a reaction?
-Increasing temperautre, -Increasing concentration, Increasing pressure, -Increasing the surface area, -Adding a catalyst,
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How does an increase in the temperature affect the rate of a reacrtion?
Increasing the temperautre gives particles more kinetic energy which means they move around faster so are more likely to collide with each other and have enoughj energy to react,
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How does an increase in concentration or pressure for gases increase the rate of the reaction?
As there are more particles in the same amount of space, so they are more likely to collide with one anothjer
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How does increasing the surface area of a solid reactant increase the rate of the reaction?
It increases the amount of sides the particles can collide with so they are more likely to collide so increases the number of particles that come into contact with the solid reactant,
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How does a catalsyt increase the rate of the reaction?
It decreases the activation energy needed for the particles to form a product when they collide so speed up the reaction,
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What is the activation energy?
The amount of energy needed for a reaction to happen and to start to break the bonds and start the reaction again,
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What is a catalyst?
Any substance which changes the rate of a reaction without being used up in the process,
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Why can't can't an iron catalyst be used in every reaction?
As the type of catalsyst is specific to every reaction,
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What are the advantages of catalysts?
-They reduce the need for high temperatures and pressures so it makes the processes cheaper, -Using lower temperatures means there is less enegy demands so less carbon dioxide prodcued, - They don't run out so no need to repace,
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Card 2

Front

What is the first way to measure the rate of a reaction by measuring gas?

Back

In a reaction that produces gas, like between an acid and an alkali, are put in a beaker and a gas syringe fixed on with a bung to collect gas given. Stopwatch used-records reaction time.At intervals, record how much gas is produced in a graph,

Card 3

Front

What is another way to measure the rate of a reaction that loses mass?

Back

Preview of the front of card 3

Card 4

Front

What is the third way to measure the rate of a reaction that turns cloudy?

Back

Preview of the front of card 4

Card 5

Front

What is the last way to measure the rate of a reaction?

Back

Preview of the front of card 5
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