A tiny sample of an aqueous substances R molecules could be seen. (The water mol

Question

A tiny sample of an aqueous substances R molecules could be seen. (The water molecules are not shown.) solution of two substances R and P is sketched below, as if it was under an imaginary microscope so powertful that individua R and P can interconvert. That is, R can turn into P, and P can turn back intoR R(aq) = P(aq) The equilibrium constant K for this equilibrium is 1. Predict the number of R and P molecules in this sample when the interconversion reaches equiibrium. K-1 number of R molecules 2

Explanation / Answer

Answer

Number of R molecules = 6

Number of P molecules = 6

Explanation

R(aq) <-------> P(aq)

K = [P]/[R]

at equillibrium

[ P ] = 10+x

[R] = 2-x

10 + x /(2-x) = 1

10 + x = 2- x

2x = -8

x = -4

Therefore,

[ R] = 2 - ( -4) = 6

[ P ] = 10 + ( -4) = 6

  

  

  

  

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