In which solution will thymol blue indicator appear blue?
(1) 0.1 m ch3cooh (3) 0.1 m hcl
(2) 0.1 m koh (4) 0.1 m h2so4

(2) 0.1 M KOH

Explanation:

Thymol blue is an universal indicator. Thymol blue has a blue color when in basic conditions (pH > 7), a green color in neutral conditions (pH =7), and a yellow color in acidic conditions (pH < 7).

pH or pOH is the measure of acidity or alkalinity of a solution.  pH is calculated by taking negative logarithm of hydrogen ion concentration.

0.1 M ,  0.1 M  and  0.1 M are all acidic in nature.

Thus thymol blue will appear blue in basic 0.1 M KOH.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.