Question 1
Bromothymol blue indicator changes color from yellow at a pH of 6.0 to blue at a pH of 7.6. Methyl red indicator changes color from red at a pH of 4.4 to yellow at a pH of 6.2. A sample of saliva having [H
3O
+] = 6.310
× 10
-7 would impart a ________ color to bromothymol blue and a ________ color to methyl red.
Question 2
The pH of a 0.055 M KOH solution is ________.