For a binary ideal solution, the total pressure of the solution is given as
ptotal = p10 + (p20-p10) x2
ptotal = p20 + (p20-p10) x2
ptotal = p10 + (p20+p10) x2
ptotal = p10 + (p10-p10) x2
For a binary ideal solution, the total pressure is
ptotal = x1p10 + x2p20
=(1-x2)p10 + x2p20
=p10+ (p20-p10) x2
p+1 is a factor of p10−1.