Question

An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance’s identity?
t should turn phenolphthalein from colorless to pink because it is a base.
It should turn phenolphthalein from pink to colorless because it is a base.
It should turn methyl orange to orange because it is an acid.
It should turn methyl orange to red because it is an acid.

Answer 1

Answer:- It should turn methyl orange to red because it is an acid. Explanation:- Acids are substances that release protons on dissolving in water. Litmus is an indicator solution. Acids can turn a blue litmus paper to red. This can be used to find out if a solution is acidic or basic. Another test for acids is using phenolphthalein. Acids can turn a pink phenolphthalein solution colorless. Acids can also turn Methyl orange solution red.  Thus our solution should turn methyl orange to red because it is an acid