Calculating Reaction Rates

Question	Answer
What is reaction rate?	The change in the amount of reactants or products per unit time (usually per second)
What is the equation for reaction rate?	Reaction rate = (amount of reactant used or product formed) / time
Name 5 methods of measuring progress of a reaction	Change in mass (gas) Gas volume (... gas) Changes in pressure (gases) Changes in colour (solutions) Changes in conductivity
What are the advantages and disadvantages of measuring change in mass?	PROS Very accurate Easy to use CONS Could be dangerous if the gas is toxic or flammable (so it's best to carry out the experiment in a fume cupboard)
What are the advantages and disadvantages of measuring gas volume?	PROS Accurate Can be used for toxic/flammable gases (no gas escapes) CONS Vigorous reactions can blow the plunger out of the syringe
How can reaction rate be calculated using a graph?	The reaction rate is the gradient of the graph at a particular point. If the graph's a curve, draw a tangent to the curve and find the gradient of that Gradient = Δy / Δx

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	Created by Yinka F about 6 years ago