What is the pH of sulfuric acid?

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Sulfuric acid can not be defined by a single pH, and can only have a pH as such when it is in a solution of water, where the pH is a measure of the hydrogen ion concentration: pH=-log10(H+) which occurs from dissociation.

The pH of sulfuric acid in water, and any other acid in water, for that matter depends upon its concentration (moles of the acid per litre of the acid/water mixture, where 1 mol is the amount of pure substance containing the same number of chemical units as there are atoms in exactly 12 grams of carbon-12). We usually say that 'X' mol L-1 of a substance has a pH of 'Y'.
For the case of sulfuric acid, first consider its dissociation. Sulfuric acid is diprotic, meaning that it has 2 ionizable hydrogen atoms per molecule and dissociates in a 2-step process:
H2SO4 H+(aq) + HSO4−(aq)
The second step in dissociation is:
HSO4− H+(aq) + SO42−(aq)

The dissociation is not as straightforward as it may appear since the completeness of the dissociation in each case is governed by Ka values (dissociation constants), which are different for each step: one proton is a strong acid and dissociates completely (i.e., dissociation in the first step is complete), and the other is a weak acid and does not (i.e., dissociation in the second step is not complete). Without going in to unnecessary detail (which only a chem major would need to worry about), we'll assume that dissociation in the second step is negligible, and hence we consider one H+ in our calculation of pH.

X mol L-1 H2SO4 therefore produces X mol L-1 H+.
The pH of X mol L-1 H2SO4 is therefore:
pH = -log10(X)
Hence, if we have, for example, a 0.2 mol L-1 H2SO4 solution, it has a pH of -log10(0.2)=0.7. A higher concentration of sulfuric acid will have an even lower pH.
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What is the pH of 0.15M sulfuric acid?

pH 1 to 2 . Sulfuric acid is a strong di protic acid: [H + ] = 2 * 0.15 = 0.30 mole/L H + pH = -log 0.30 = 0.52 pH 2.

How do you calculate pH of sulfuric acid from its molarity?

pH = -log 10 [H + ]. you need to know the number of moles of hydrogen ions in your sulphuric acid. for example if you have a 0.25M solution of sulphuric acid, you will have

What colour does pH paper turn when dipped in sulfuric acid?

Unfortunately, it depends on the type of pH paper. If you mean standard litmus paper, it will be red (red litmus paper stays that way and blue litmus paper will turn red). Uni

What you pH value when 100 percent sulfuric acid?

100% sulfuric acid rapidly decomposes until it reaches a concentration of 98%. This concentration is usually referred to as concentrated sulfuric acid. The pH value of 98%

What is the pH values of sulfurous acid?

pH depends, in part, on the molarity, or concentration, of the acid. Without a molarity, it is impossible to determine pH.

What does adding sulfuric acid to water do to pH?

it increases it -------------- Incorrect. The most common pH of water is 7. Sulfuric acid usually has a pH of 0-3 depending on purity. By adding sulfuric acid (pH 0-3

Can the pH of sulfuric acid be below 0?

Yes. An acid will have a negative PH under the circumstance that it is a strong acid as well as it has a concentration of over 1 mol/L as using the function -log(H3O+)... If a
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Can sulfuric acid be used to lower pH in a hot tub?

While it would lower the pH, sulphuric acid is a strongly oxidizingacid too that will burn organic materials (flesh) and is thus notsafe for use in pools and hot tubs. Use onl