[DUser]

Hello.I have one question.My eng is bad so try to understand me =)

If one 95% acid boils on 135 C ..what will be the boiling point of same acid but in 20% solution in wather ... (20% acid 80% wather)

Thanks ..

[DevaDevil]

To answer this you might want to check out the boiling point elevation in solvents

dT = K_b * m

dT = elevation of boiling temperature
K_b = constant of increase in boiling point per molal
m = molal of the solute (in your case the acid)

I'll give you the value of K_b in water: 0.52 ^oC m^-1
First you calculate the molality of your 95% acid, then calculate back the molality of the 20% acid, and finally calculate the new boiling temperature.

PS. Remember, 1 molal = 1 mol soluted in 1000 g solvent