Question

The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of H3O+ ions in the solution?

Use: [H3O+]=10-PH

A) 1.05x10^-3 M
B) 4.79x10^-3 M
C) 2.09x10^2 M
D) 9.55x10^2 M

Answer 1

B) 4.79x10^-3 M

Step-by-step explanation:

Answer 2

pH = -log[H₃O⁺]

[H₃O⁺] = 10^-pH
[H₃O⁺] = 10^-2,32
[H₃O⁺] =0,0047863 ≈ 4,79×10×10⁻³ mol/dm³


B) -- 4,79×10⁻³ M