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Nikitich [7]
3 years ago
5

Which statement is true of a chemical change?

Chemistry
2 answers:
Andru [333]3 years ago
5 0
The appropriate answer is a. it involves a change in the molecular structure of the substance. A change in phase or state is referred to as a physical change. For example...liquid water freezing is a physical change because the state changes but solid water is still H20. Separating water into its constituent atoms, hydrogen and oxygen is a chemical change because the molecular structure of water is now non existent.
tatiyna3 years ago
4 0
The answer is c. There wouldnt be a process or a change to it
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Precipitation reaction is defined as the chemical reaction in which two aqueous solution upon mixing together results in the formation of an insoluble solid.

For example, NaCl(aq) + AgNO_{3} \rightarrow NaNO_{3}(aq) + AgCl(s)

Here AgCl is present in solid state so, it is the precipitate.

But it is not necessarily true that two aqueous solutions will always result in the formation of a precipitate.

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Hence, we can conclude that the statement precipitation reactions always occur when two aqueous solutions are mixed, is false.

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lara31 [8.8K]
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