Here's why:
* Hydrolysis: When sodium nitrite dissolves in water, it dissociates into sodium ions (Na⁺) and nitrite ions (NO₂)⁻. The nitrite ions react with water molecules to form nitrous acid (HNO₂) and hydroxide ions (OH⁻).
* Base Formation: The hydroxide ions produced increase the pH of the solution, making it basic.
The exact pH of a sodium nitrite solution depends on its concentration. Higher concentrations will result in a more basic pH.
However, it is important to note that:
* Sodium nitrite is a toxic substance and should be handled with care.
* The pH of sodium nitrite solutions can be calculated using appropriate chemical equations and equilibrium constants.
To determine the exact pH for a specific sodium nitrite solution, you would need to know its concentration and use the appropriate chemical equilibrium expressions.
