what evidence supports the clarification that H2Se 03 is an acid and how do i identify the positive ions present inthe aqueous solution
I am a little confused by the word "clarification" in your question. What evidence do you have? Could you measure the pH of the solution? Would that tell you H^+ (positive ions) were present? What about electrical conductance of an aqueous solutin? Would that tell you it was ionized, at least somewhat?
it says that the solution conducts electricity and turns litmus paper red
Isn't that enough to tell you. Conductance means there are ions there. Litmus paper tells you it is acid and that means hydrogen ions are present.
Yes, you are correct. The evidence provided - the fact that the solution conducts electricity and turns litmus paper red - strongly supports the clarification that H2SeO3 is an acid. Let's break down the evidence and explain why it indicates the presence of positive ions:
1. Conductance: The ability of a solution to conduct electricity is directly related to the presence of ions in that solution. When an acid dissolves in water, it ionizes to release positively charged hydrogen ions (H+). These ions are responsible for the electrical conductivity of the solution. Therefore, if the solution conducts electricity, it indicates the presence of positive ions, which in this case are the hydrogen ions (H+) from the H2SeO3 molecule.
2. Litmus paper: Litmus paper is a pH indicator that changes color in the presence of acidic or basic solutions. If the litmus paper turns red when it comes into contact with the solution, it suggests that the solution is acidic. Acids, such as H2SeO3, release hydrogen ions (H+) when dissolved in water, which reacts with the litmus paper to give a red color. Therefore, the red color observed on the litmus paper serves as evidence of the presence of positively charged hydrogen ions (H+).
In conclusion, based on the evidence provided, namely the solution's ability to conduct electricity and the change in color of the litmus paper to red, we can reasonably infer that H2SeO3 is indeed an acid and that it contains positively charged hydrogen ions (H+) in the aqueous solution.