Question

When do bases change the color of methyl orange?

Answer 1

We need to know that the acids are proton donors while bases are proton acceptors. Acid is any chemical compound which when dissolved in water gives a solution with ${H^ + }$ ion activity more than purified water. A base is an aqueous substance that donates electrons, accepts protons or releases hydroxide ($O{H^ - }$) ions.

Complete answer:
We need to know that the acidic substances are usually identified by their sour taste. An acid is a molecule which can donate an ${H^ + }$ ion and can remain energetically favorable after a loss of ${H^ + }$.Acids are known to turn blue litmus red.
Bases, on the other hand, are characterized by a bitter taste and a slippery texture. A base that can be dissolved in water is referred to as an alkali. When these substances chemically react with acids, they yield salts. Bases are known to turn red litmus blue.
Methyl orange is a pH indicator frequently used in titrations because of its clear and distinct color change. Because it changes color at the pH of a mid strength acid, it is usually used in titrations for acids. An Acid changes the color of methyl orange to red while a base changes the color of methyl orange to yellow. There are many pH indicators that are used in acid base titrations. Phenolphthalein and methyl orange are the commonly used pH indicators.

Note:
We need to know that acids usually have a pH value lower than $7$ while bases have a pH value greater than $7$. While neutral solutions have a pH value of $7$. Methyl orange does not have a full spectrum of color change, but it has a sharp end point unlike universal indicators.