Question

the ph of lime is 1.90 what is the H30

Answer 1

Answer:

2.90 is correct answer

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The H3O+ is the conjugate acid of H20. So H3O+ is used as a shorthand for a proton in aqueous solution. In a non-aqueous solution the proton would form a different structure.

Answer 2

Given:

The pH of lime = 1.90

To Find:

The concentrations of H₃O⁺

Solution:

The pH of a solution gives the measure of the concentration of H⁺ ions in the solution.

These H⁺ ions associate with water molecules to form hydronium ions as shown:

H⁺ + H₂O → H₃O⁺

According to the formula,

pH = - log [H₃O⁺]

or 1.90 = - log [H₃O⁺]

Taking antilogs on both the sides,

[H₃O⁺] = 10⁻¹'⁹⁰

= $\frac{1}{10^1^.^9^0}$  

= 1.26 X 10⁻² mol L⁻¹

Hence, the [H₃O⁺] is 1.26 X 10⁻² mol L⁻¹.

(The complete question is: If the pH of lime is 1.90. What is the [H₃O⁺]?)