pKa=-log(Ka)=-log( 1.3 × 10-6)
pH=pKa=log(A-/HA) solve for the ratio
purple means ratio is one or very close to it
blue means ratio is 1>
red means ratio is 1<
****But check my thinking.
A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red.
What is the pKa of the indicator?
What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?
1 answer
1 answer