# Equilibria & Concentrations

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• Created by: J.E.C.
• Created on: 28-04-14 17:08
The ratio of concentration over pressure is always __ at a particular __? The ratio represents the ___ ___ and is given the symbol _?
Constant, temperature. Equilibrium constant, K
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If the equilibrium concentration of a reactant is less than one then...?
A proportion of reactants must be left unreacted and reaction is incomplete.
2 of 8
Give the first step you would carry out before writing an expression for Kc?
Write a balanced equation
3 of 8
For the Kc expression, the products go on __ and the reactants go on the __? The power to which you raise the concentration of a substance is equal to the..?
top, bottom. Number in front of it in the balanced equation.
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For any value of Kc, you must quote the __ and __? The units can be worked out from the __?
Units, temperature. Expression
5 of 8
The composition of a reaction mixture will always adjust to keep the Kc value constant, provided..?
The temperature remains constant
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For equilibria in te gas phase, a change in total pressure affects the position of equilibrium if..?
There is a change in the number of gas molecules in the reaction.
7 of 8
A rise in temperature favours the ___ and increases __ for endothermic reactions?
products, Kc
8 of 8

## Other cards in this set

### Card 2

#### Front

If the equilibrium concentration of a reactant is less than one then...?

#### Back

A proportion of reactants must be left unreacted and reaction is incomplete.

### Card 3

#### Front

Give the first step you would carry out before writing an expression for Kc?

### Card 4

#### Front

For the Kc expression, the products go on __ and the reactants go on the __? The power to which you raise the concentration of a substance is equal to the..?

### Card 5

#### Front

For any value of Kc, you must quote the __ and __? The units can be worked out from the __?