#### Answer

Basic

#### Work Step by Step

$\mathrm{p}\mathrm{H}_{substance}=-\log[\mathrm{H}^{+}]=-\log(3.1\times 10^{-8})\approx 7.5$
Since the pH$\gt7$, the substance must be basic.

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

Basic

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