Drano Chemistry Lab: Physical & Chemical Changes

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Mixing Drano with water results in a chemical change due to the formation of new substances as it reacts to unclog drains. Similarly, dissolving ammonium chloride in water is also a chemical change, as it involves a reaction that alters the chemical structure of the compound. Exothermic reactions are typically classified as chemical changes because they involve the breaking and forming of bonds, leading to new substances. However, some physical changes can also release heat, but these are less common. Understanding the distinction between physical and chemical changes is crucial for lab work and chemistry studies.
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can n e one help me with my lab? :confused: we had to mix
a)drano (a substance used to unclog drains) with water
b) ammonium chloride with water

can you tell me if these are chemical or physical changes and whyyy?? THANKZZ A BUNCH!
 
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Since this is homework, you need to show us some work before we can help you. What do you think?
 
ohh alriight... I actually figured it out after based on my observations
 
BUT umm..are all exothermic reactions chemical changes? or can they be physical changes aswell...since they relase heat?
 

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