Final answer:
Oranges with a pH of 3.89 have a concentration of H₂O of 55.5 M and a concentration of OH⁻ ions of 0.0000124 M.
Step-by-step explanation:
In oranges with a pH of 3.89, the concentration of H₂O can be considered as 55.5 M, as water is the solvent and its concentration remains constant. The concentration of OH⁻ ions can be determined using the pH value and the fact that water undergoes autoionization. The concentration of OH⁻ ions in oranges with a pH of 3.89 is approximately 0.0000124 M.
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