In which solution will methyl orange indicator give a yellow color?

Expert Answers info

Kyleigh Macejkovic eNotes educator | Certified Educator

briefcaseCollege Professor


calendarEducator since 2015

write3,348 answers

starTop subjects are Science, Math, and Business

Methyl orange is an acid-base indicator and changes color depending on the pH of the solution. If it is added to an alkaline or neutral solution, it will turn the solution yellow. If it is added to an acidic solution, it will turn the solution red. However, the color change is not drastic, rather it is gradual.

Methyl orange has a pH range of 3.1-4.5. Below a solution pH of 3.1, its color is red. If we keep on adding an alkali to the solution, the solution pH will increase and slowly the color will change. It will transition from red to orange and then to yellow as the pH continually increases.

Methyl orange is commonly used to measure the acidity or alkalinity of a given water sample. 

Hope this helps. 

check Approved by eNotes Editorial


Ask a Question