is milk turning sour a chemical or physical change
Best answer
Chemical change
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Is the souring of milk a chemical change?
The souring of milk is classified as a chemical change because it results in the production of sour-tasting lactic acid. Both physical and chemical changes closely relate to physical and chemical properties. A chemical change occurs at a molecular level. Is cheese a chemical reaction?
Why does milk turn sour when it is boiled?
Explanation: When milk turns sour, what is actually happening is that bacteria are converting the lactose sugars in milk into energy, with lactic acid as a byproduct. This is a chemical process, as new substances (lactic acid) has been formed.
What happens to lactose in milk when it turns sour?
When milk turns sour, what is actually happening is that bacteria are converting the lactose sugars in milk into energy, with lactic acid as a byproduct. Related questions.
What are the similarities between physical and chemical changes?
Both physical and chemical changes closely relate to physical and chemical properties. A chemical change occurs at a molecular level. For a change to qualify as chemical a new substance has to be formed and energy is either absorbed or given off. A physical change is characterized with states of matter and energy.
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