The pH of solution A is 2.4 , while the pH of solution B is 9.4.

(a) What are their hydrogen-ion concentrations?

(b) How many times greater is the hydrogen-ion concentration of solution A than that of solution B?

(c) By how many orders of magnitude do the concentrations differ?

The answer to your question is below

Step-by-step explanation:

pH definition

pH = - log [H⁺]

a) For pH = 2.4, solution A

2.4 = - log[H⁺]

[H⁺] = antilog⁻².⁴

[H⁺] = 0.00398

For pH = 9.4, solution B

[H⁺] = antilog⁻⁹.⁴

[H⁺] = 3.98 x 10⁻¹⁰

b) Divide hydrogen-ion concentration of solution A by hydrogen-ion concentration of solution B.

0.00398 / 3.98 x 10⁻¹⁰

10000000 times

c) By 7, because 7 is the number of zeros