Question

A solution is tested with litmus paper and its pH value is 3. What color does litmus paper turn in this solution? What is the hydronium ion concentroation of this solution? What is the hydroxide ion concentration of this solution? What is the pOH value of this solution is ​

Answer 1

Litmus paper turns red in acidic solutions, so the litmus paper would turn red in this solution.

Step-by-step explanation:

A pH of 3 indicates that the hydronium ion concentration is 1 x 10^-3 moles per liter (mol/L) or 0.001 mol/L.

To find the hydroxide ion concentration of the solution, we can use the equation:

Kw = [H3O+][OH-]

Where Kw is the ion product constant of water (1.0 x 10^-14 at 25°C).

Rearranging the equation to solve for [OH-]:

[OH-] = Kw / [H3O+]

[OH-] = 1.0 x 10^-14 / 0.001

[OH-] = 1.0 x 10^-11 mol/L

The pOH value can be found using the equation:

pOH = -log[OH-]

pOH = -log(1.0 x 10^-11)

pOH = 11

Finally, we can use the relationship:

pH + pOH = 14

to find the pH value of the solution:

pH + 11 = 14

pH = 3

So the solution has a pH of 3, a hydronium ion concentration of 0.001 mol/L, a hydroxide ion concentration of 1.0 x 10^-11 mol/L, and a pOH of 11.