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What is the pH value of an aqueous solution of 35% sulfuric acid?

2009-02-04View Original

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Has anyone done similar experiments? Could you please provide the pH value of an aqueous solution of 35% sulfuric acid?
Reply #22009-02-04
I suggest you use a PH meter to measure it, and the result will be available right away!
Reply #32009-02-04
Salts of strong acids and weak bases should be acidic. It can be roughly determined using a pH test strip. It can also be accurately measured using a pH meter.
Reply #42009-02-04
Thank you to the person above; I wonder where you got your data from?
Reply #52009-02-04
Just measure it with a pH meter; it’s very accurate
Reply #62009-05-19
I calculated it before; it seemed to be around 4.7
Reply #72009-05-19
We produce AN sulfate fertilizer; AN sulfate is a salt of a strong acid and a weak base, with a pH value between 3 and 4.
Reply #82009-05-19
The original post has been deleted, so it’s being posted here. The concentration of the 35%(NH4)2SO4 solution is c=35/132/0.1=2.65. (NH4+)+(OH-)=NH3H2O; */=Kw/Kb. Let x be in mol/l; then x*x/2.65/2=(1*10^-14)/(1.74*10^-5), so x=5.52*10^-5. The pH value is -lg(x)=4.3

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