Which of the following relationships correctly expresses the hydronium-ion…

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Which of the following relationships correctly expresses the hydronium-ion concentration

[H_3O^+]

in terms of pH? (a)

[H_3O^+] = 10^{\mathrm{pH}}

(b)

[H_3O^+] = e^{-\mathrm{pH}}

(c)

[H_3O^+] = 10^{-\mathrm{pH}}

(d)

[H_3O^+] = -\log(\mathrm{pH})