Answer:
12.55 → pH
Explanation:
pH = - log [H⁺]
pH = 14 - pOH
pOH = - log [OH⁻]
pOH = - log 0.035 = 1.45
14 - 1.45 = 12.55 → pH
Remember that [OH⁻] . [H⁺] = 1×10⁻¹⁴ M
