Aluminum metal and bromine liquid (red) react violently to make aluminum bromide

Question

Aluminum metal and bromine liquid (red) react violently to make aluminum bromide (white powder). One way to represent this equilibrium is 2 Al(s) + 3 Br2(1) 2A1Br3(s) We could also write this reaction three other ways, listed below. The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above. l) 2 A Br3(s) -2 Al(s) + 3 Br2(1) K,- 2) AlBr3(s)+3/2 Brl) K2- 3) Al(s) + 3/2 Br21)^ AlBr3(s)

Explanation / Answer

Q1.

the reaction has been --> inverted

so K effect --> Koriginal ^-1

then

K1 = K0^-1

b)

the reaction has been --> inverted and divided by 2 so effect is ^-1 and ^1/2

K2 = [(K)^-1 ] ^1/2

K2 = K^-1/2

q3)

reaction has bee just divided by 2

K3 = (K)^1/2

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