rates of reaction - mean rate of reaction and using tangents Flashcards
(12 cards)
what does the slope of a line tell us
the rate of a reaction
the steeper the slope = ?
the faster the reaction
from interpreting a graph, how can we tell that at the beginning the rate or reaction is very fast
we are making a lot of product in a short number of time
why over time does the rate of reaction slow down
because a lot of the reactant molecules have already been reacted and turned into products
what happens at the end of a graph
what does this tell us
the line begins to flatten out and the rate of reaction is at 0
this tells us that the reaction has stopped
how to we measure the quantity of gas
in cm^3
what is different about a graph in which we are measuring the amount of reactant used
it slopes from high to low
how do we calculate the mean rate of reaction
quantity of product formed/ time taken
unit for rate of reaction
g/s
how do scientists overcome the problem that the curve is always changing?
by drawing a tangent which just touched the point on the curve you’re wanting to work out
what does the slope of the tangent tell us
the rate of the reaction
how to work out rate of reaction from tangent
draw triangle, work out sides divide y by x
