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Which of the following is NOT an example of homogeneous mixture?
A mixture of copper sulphate in water
A mixture of sugar in water
A mixture of salt in water
A mixture of iron nails in water
A mixture of iron nails in water
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. A mixture of iron nails in water is heterogeneous because the components remain physically separate and are not uniformly distributed.
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. A mixture of iron nails in water is heterogeneous because the components remain physically separate and are not uniformly distributed.
Think of salt water as a perfectly blended smoothie where you cannot see the individual salt grains, while iron nails in water are like a bowl of cereal where you can easily pick out the individual pieces.
HOMO = SAME (Homogeneous mixture = same composition throughout).
C=VmтАЛ тАФ where C is concentration, m is mass of solute, and V is volume of solvent.
In a homogeneous mixture, the solute particles dissolve at the molecular or ionic level, creating a uniform phase (a solution). In contrast, iron nails in water form a mechanical mixture where the iron (a solid metal) does not dissolve, maintaining distinct boundaries visible to the naked eye or under a microscope, thus failing the criteria for homogeneity.
Homogeneous mixtures appear as a single phase throughout.
Heterogeneous mixtures have visibly different parts and non-uniform composition.
Dissolution in water results in a true solution (homogeneous) for soluble salts/sugars.
Homogeneous mixtures are uniform, making them ideal for precise concentration usage in lab settings.
Heterogeneous mixtures like iron and water are easier to separate mechanically.
Preparation of standard chemical solutions
Understanding solvent properties in industrial chemistry
Copper sulphate, sugar, and salt are highly soluble in water, forming true solutions (homogeneous).
Iron is insoluble in water, thus forming a heterogeneous suspension/mixture.
D is correct тАФ A mixture of iron nails in water is a heterogeneous mixture because the components are not uniformly distributed and remain physically distinct.
When asked to identify a mixture type in exams, ask yourself: 'Can I see the components separately?' If yes, it is almost certainly heterogeneous.
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