QQuestion
Question
Is milk souring (going bad) classified as a physical or chemical change?
Physical change
Chemical change
10 months agoReport content
Answer
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Step 1:I'll solve this problem step by step, explaining the key characteristics of physical and chemical changes.
Step 2:: Understand the Nature of Milk Souring
Milk souring involves a fundamental transformation of the milk's chemical composition. When milk sours, bacteria convert lactose (milk sugar) into lactic acid, which changes the milk's molecular structure.
Step 3:: Identify Key Characteristics of Chemical Changes
Chemical changes involve: - Formation of new substances - Irreversible transformation - Change in chemical composition - Often accompanied by: - Color change - Gas production - Temperature change
Final Answer
The key distinguishing factor is the formation of new chemical substances through bacterial action, which permanently alters the milk's molecular structure.
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