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# Dissociation and $K_a$

APCHEM-9ZPJMV

The $K_a$ for an acid is $1 × 10^{–6}$ at room temperature.

At this temperature, what is the approximate percent dissociation of the acid in a 1.0 M solution?

A

$0.01 \%$

B

$0.10 \%$

C

$1.0 \%$

D

$10 \%$