What do scientists use to communicate extremely small measurements? physical models
base units
unit prefixes
graduated cylinders
scientific notation

The equilibrium expression for methyl orange is shown in the image attached. The colour in acid is red while the colour in base is yellow. At the neutral point, it has an orange colour

Explanation:

An indicator is an organic substance whose colour changes with changing hydrogen ion concentration. Because the colour changes with changing hydrogen ion concentration, it can be used to decide the end point of a neutralization reaction since it produces a colour change that signifies chemical equivalence. Methyl orange is normally used as indicator for strong acid weak base or strong acid strong base titration