Given That K_a for the Weak Acid HA Is 3 $\ell$

Given that K_a for the weak acid HA is 3.49 × 10^-8, calculate K for the reaction of HA with OH^-. HA(aq) + OH?(aq) D A?(aq) + H₂O( $\ell$ )

A) 3.49
B) 3.49 × 10⁶
C) 3.49 × 10^-22
D) 2.87 × 10²¹
E) 2.87 × 10^-7