## Chemistry: The Molecular Science (5th Edition)

Hydronium ion concentration: $[H_3O^+] = 3.162 \times 10^{- 11}M$ This solution is basic.
$[H_3O^+] = 10^{-pH}$ $[H_3O^+] = 10^{- 10.5}$ $[H_3O^+] = 3.162 \times 10^{- 11}$ Solutions with pH>7 * are considered basic. * or $[H_3O^+] < 10^{-7}M$ * At 25$^{\circ}$ C