* Color Change: Methyl orange is an acid-base indicator. In acidic solutions, it is red, while in basic solutions, it turns yellow. Sodium hydroxide is a strong base. Therefore, when methyl orange is added to NaOH, it will turn yellow.
* Reaction: The methyl orange indicator does not directly react with NaOH. The color change is due to the change in pH of the solution. NaOH dissociates in water to produce hydroxide ions (OH-), which makes the solution basic. This change in pH causes the methyl orange to change color.
In summary: Adding methyl orange to sodium hydroxide solution will result in the solution turning yellow due to the basic nature of NaOH, which causes the indicator to change color.
