Which ion is described as the alkali ion in the material?

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Multiple Choice

Which ion is described as the alkali ion in the material?

Explanation:
Alkalis create alkaline solutions by increasing the amount of hydroxide ions in water. The ion that directly brings this basic character is the hydroxide ion, OH-. If you think of a base like NaOH, it dissolves to give Na+ and OH-, and the presence of OH- raises the pH. In contrast, H+ would make the solution acidic, Na+ is just a metal cation accompanying the base, and Cl- is a halide with no basicity. So the alkali ion described is hydroxide, OH-.

Alkalis create alkaline solutions by increasing the amount of hydroxide ions in water. The ion that directly brings this basic character is the hydroxide ion, OH-. If you think of a base like NaOH, it dissolves to give Na+ and OH-, and the presence of OH- raises the pH. In contrast, H+ would make the solution acidic, Na+ is just a metal cation accompanying the base, and Cl- is a halide with no basicity. So the alkali ion described is hydroxide, OH-.

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