Yes, it is a chemical change (reaction) though it carried out by microorganisms (Lactic acid bacteria):
Out of glucose through the Embden-Meyerhof-Parnas (EMP) pathway yielding two moles of pyruvate.
Intracellular redox balance is maintained through the oxidation of NADH, concomitant with pyruvate reduction to lactic acid.
Two steps in short formula:
C6H12O6 --'EMP'--> 2 C3H3O3- + 2 H+ --'Reduct'--> 2 C3H6O3
and in words:
glucose -> 2 pyruvate (2-oxopropanoate) + 2H+ -> 2 lactic acid (2-hydroxypropanoic acid)
Yes, it is a chemical change. Milk contains sugar in the form of Lactose, which on microbial action breaks down to Lactic acid. This lactic acid lowers the pH of the milk making it sour.
Yes, lactose is converted to lactic acid which sours the milk
It is a chemical change because there is a chemical reaction occurring that is rotting the milk. An example of a physical change would be if the milk was evaporated or frozen.
Yes, milk turning sour is a chemical change because you cannot turn sour milk back into normal milk, for it contains bacteria.
Yes.
chemical change
Yes, milk turning sour is a chemical change.
no it is chemical
milk going sour is a chemical change because it can't be reversed. Most physical changes can be reversed for example snow melting is a physical change because it can freeze again.
True
Yes.
chemical change
Milk turning sour is a chemical change.
Yes, milk turning sour is a chemical change.
yes See Is Sour Milk a physical or chemical change for more info
chemical change
Physical changes are like water turning into ice, they can be reversed. Chemical changes form a new substance. Soured milk can not be reversed, so it is chemical.
It is a chemical change because there is a chemical reaction occurring that is rotting the milk. An example of a physical change would be if the milk was evaporated or frozen.
why is milk turning sour during summers
no it is chemical
chemical because u cant change it back into fresh milk
milk going sour is a chemical change because it can't be reversed. Most physical changes can be reversed for example snow melting is a physical change because it can freeze again.