What evidence supports classifying H2SeO3 as an acid?
In a water solution, it turns blue litmus red.
To classify H2SeO3 as an acid, we can look for evidence based on its behavior in a water solution.
One piece of evidence is that H2SeO3 turns blue litmus paper red. Litmus paper is a commonly used indicator that changes color in the presence of acids or bases. Blue litmus paper turns red in the presence of an acidic solution, indicating that the solution is acidic. Therefore, the observation that H2SeO3 turns blue litmus red suggests that it is an acid.
It is worth noting that this evidence alone is not conclusive, as other compounds can also turn blue litmus red. To obtain more evidence and support this classification, further experiments and observations may be required, such as testing the compound's behavior with other acid-base indicators or determining its ability to donate protons (H+) in a chemical reaction.