why there no color change in Glycine when mix with HNO and NAOH
The lack of color change in glycine when mixed with HNO3 (nitric acid) and NaOH (sodium hydroxide) can be attributed to the specific properties of these substances and the chemical reactions that occur.
Glycine is a small, non-aromatic amino acid that exists as a white crystalline powder. It is typically colorless in its pure form. When mixed with nitric acid (HNO3), glycine undergoes a reaction known as nitration. Nitration involves the substitution of a nitro (-NO2) group for one of the hydrogen atoms in the glycine molecule. However, this reaction does not result in a visible color change.
Similarly, when glycine is mixed with sodium hydroxide (NaOH), it undergoes a reaction called neutralization. Sodium hydroxide is a strong base that can neutralize acidic substances like glycine. The reaction between glycine and sodium hydroxide produces water and a sodium salt of glycine (sodium glycinate). Once again, this reaction does not typically yield a discernible color change.
In both cases, the lack of color change can be attributed to the absence of any specific chromophores (color-producing groups) in glycine's molecular structure. Without chromophores, the resulting products of these reactions do not exhibit any noticeable color changes.
To verify this information and explore further, you can conduct experiments or refer to scientific literature on the properties and reactions of glycine with specific reactants.