An aqueous solution containing bromothymol blue is used to identify the chemical properties of thionyl chloride gas. When the gas is bubbled through the bromothymol blue solution color changes from blue to yellow we could say that the gas ____________________.

Question 4 options:

1) produces a basic solution when it reacts with water.

2) reacts with water to produce an acidic solution.

3) is chemically inert.

4) is chemically reactive and reacts with water to produce a strongly basic solution.

5) is an odorless but toxic gas.
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1 answer

Bromothymol blue is yellow in acid and blue in basic solution.
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