a student heats up a test tube containing large amount of protien and biuret reagent. She notices a colour change from violet to blue. Explain why heating causes a colour change.
Becouse there is chemical reaction at the hight temperuture, and reagent bind to protein, that give new color (by the way – chang from violet to blue is a slight color change, becose those colorse is close to one another at the spectrum)
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