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It's a chemical change. The smell is the giveaway; a smell that wasn't there before is often an indicator of a chemical change. Also, the rate at which the milk sours can be changed by heat. For example, milk in the refrigerator is actually undergoing this souring reaction at all times, but the lower temperature inside the refrigerator slows it down so that it takes many days. But if you leave it outside the refrigerator, it will sour much more quickly - in a matter of hours. An increase in heat, therefore, quickens the reaction rate. This would not be the case in a physical change.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoSouring of milk is a chemical change because it produces a new substance.
Wiki User
∙ 12y agoIt is a chemical change. Sugars in the milk are fermented into lactic acid.
Wiki User
∙ 11y agoChemical Change
Wiki User
∙ 11y agochemical change
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Why Milk souring is a physical change?
It is not physical but rather chemical: milk sugar (lactose) is converted to lactic acid by Lactobacillus bacteria.
Is milk souring a physical change?
It is not physical but rather chemical: milk sugar (lactose) is converted to lactic acid by Lactobacillus bacteria.
Souring of milk is an example of a?
Chemical Change.
What is a physical change Milk becomes sour an iron nail rusts?
Both milk souring and iron rusting are chemical changes.
Which of the following involves a chemical change combinding an acid and a base dew forming or souring milk?
Souring milk! (Heh, I hate section reviews!)
Is souring a milk a chemical reaction?
yes See Is Sour Milk a physical or chemical change for more info
Why Milk souring is a physical change?
It is not physical but rather chemical: milk sugar (lactose) is converted to lactic acid by Lactobacillus bacteria.
Is milk souring a physical change?
It is not physical but rather chemical: milk sugar (lactose) is converted to lactic acid by Lactobacillus bacteria.
Souring of milk is an example of a?
Chemical Change.
Is souring a physical change?
It is not physical but rather chemical: milk sugar (lactose) is converted to lactic acid by Lactobacillus bacteria.
What is a physical change Milk becomes sour an iron nail rusts?
Both milk souring and iron rusting are chemical changes.
Is milk sours a physical or chemical change?
chemical change
What is Milk going sour is physical or chemical?
Chemical. If anyone wants to put more detail, please do.
Which of the following involves a chemical change combinding an acid and a base dew forming or souring milk?
Souring milk! (Heh, I hate section reviews!)
Is milk souring a chemical or physical change or both?
Well just to start off nothing can ever be a physical and chemical change it has to be one or the other.. and the best way to know which one it is is a physical change doesnt change the substance and a chemical change will change the substance into something else. So milk going sour would be chemical because it isnt regular milk anymore its sour milk. but if it was something like evaporating water then it would be physical because its still water its just in the gas state. -Hope that helps(:
Is mixing milk with water a chemical change?
A chemical change is any type of change that results in the formation of new chemical substances. When cheese is made with milk it is a chemical change.
Why is churning a chemical change?
Souring milk causes a chemical change because it changes its state of matter (from a liquid to a semi-solid), and it grows bacteria. When milk sours it causes a permanent change, therefore making it a chemical change.
