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Chemistry A level Edexcel > Equilibria > Flashcards

Flashcards in Equilibria Deck (11)
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1
Q

Define dynamic equilibrium

A

The rate of reactions (forwards and backwards) are equal and therefore concentrations of reactants and products are equal.

2
Q

Define homogeneous equilibrium

A

Reactants and products are in the same physical state

3
Q

What factors affect equilibrium?

A

Temperature, pressure (gas only), concentration (solution only), presence of a catalyst

4
Q

What is the Kc equation?

A

Kc = ([C]^n x [D]^n) / ([A]^n x [B]^n)

5
Q

What is the Kp equation?

A

Kp = (pC^c x pD^d) / (pA^a x pB^b)

6
Q

What is the mole fraction equation?

A

Number of moles of a particular gas / total moles of all gases in mixture

7
Q

What is the equation for partial pressure?

A

Mole fraction x total pressure

8
Q

Define partial pressure

A

Pressure exerted by a particular gas in a mixture in a closed system

9
Q

Define total pressure

A

Sum of all partial pressures

10
Q

When is the reaction quotient the same as the equilibrium constant?

A

Only at equilibrium

11
Q

What is Le Chatalier’s principle?

A

System reacts to oppose the change