Does sodium nitrate turn the phenolphthalein indicator pink ?

no

To determine whether sodium nitrate turns the phenolphthalein indicator pink, we need to understand the properties and behavior of both substances.

Phenolphthalein is a commonly used pH indicator that is colorless in acidic solutions and turns pink or magenta in alkaline solutions (pH greater than 7). When an alkaline solution is mixed with phenolphthalein, the pH increases, resulting in a color change to pink.

On the other hand, sodium nitrate (NaNO3) is a salt composed of sodium ions (Na+) and nitrate ions (NO3-). It is an ionic compound that dissociates completely in water, releasing Na+ and NO3- ions. Sodium ions and nitrate ions do not have a direct effect on pH, as they are neither acidic nor alkaline.

Therefore, sodium nitrate itself does not directly affect the color change of phenolphthalein. However, if sodium nitrate is dissolved in water, the resulting solution may have a pH different from that of pure water. If the solution is alkaline (pH greater than 7), it can turn phenolphthalein pink.

To determine the exact behavior of sodium nitrate with phenolphthalein, you would need to test it by dissolving sodium nitrate in water and adding a few drops of phenolphthalein. If the solution turns pink, it indicates that the sodium nitrate solution is alkaline.