pH ranges depending on the solution, for a solution with weak acid pH will be between 4.0-7.0.
pH is helps to determine if a solution is acidic or basic in nature.
A pH meter is the instrument that can be used for the measurements.
Methyl orange is used when titrating a strong acid against a weak base.
Therefore, the pH of the solution which is a weak acid will be between 4.0-7.0.
Learn more on pH level here,
https://brainly.com/question/4137247