2 Methyl Orange can act as an anionic dye With which fabric

2. Methyl Orange can act as an anionic dye. With which fabric or fabrics from your test strip would you expect it to form ionic bonds?

Solution

The more number of ionic or polar groups the fabric contains, the more the sites on the fabric for the dye molecules to bind to.

In this case, if the fabric contains more ionic sites for the methyl orange to bind to, the intensity of the dye color will increase from orange to Red depending on the fabric which indicates the formation of ionic bonds.

Nylon - Orange
Wool - Red

Wool shows the greatest affinity to the Methyl Orange Dye. Nylon and Wool Contain the amide linkages in their repeating units which may interact with the dye molecules through Hydrogen bonding.