Question

Which must be a mixture of substances?
1. solid
2. liquid
3. gas
4. solution

Answer 1

the one that must be a mixture of substance is : 4. Solution here are some examples that proof option 1 - 3 could consist only with a single substance : Solid = Fe ( most commonly known as iron) Gas = He ( Most commonly known as helium) Liquid = Hg (most commonly known as mercury)

Answer 2

4. Solution

Further explanation

Mixtures are materials composed of two or more kinds of substances that still possess their original properties. Mixtures can also be said to represent a combination of several substances, elements or compounds

There are two types of mixtures, i.e., homogeneous mixture (or solution) and heterogeneous mixture.

• Homogeneous mixture: mixture which each part contains a similar amount of solute, for example, vinegar acid solution, sugar solution, and salt solution.
• Heterogeneous mixes: mixtures of which each part contains an unequal amount of solute, for example, river water, sewage water, and coffee drinks.

The solution is a homogeneous mixture of two or more substances that dissolve one another and each of the constituent substances cannot be distinguished physically anymore.

• The solution consists of two components, i.e., solute and solvent.
• For example, a salt solution consists of salt as a solute and water as a solvent.

In chemistry, we already know the phase of matter or state of matter, i.e., solid (s), liquid (l), gas (g), and aqueous (aq). Every chemical solution in a reaction is labeled as an aqueous phase, e.g, $\boxed{ \ NaCl_{(aq)} \ }$ as a salt solution.

Consider the following examples:

• $\boxed{ \ Fe_{(s)} \ }$ as a solid metal iron, an element.
• $\boxed{ \ H_2O_{(l)} \ }$ as liquid water.
• $\boxed{ \ H_2O_{(s)} \ }$ as ice solids.
• $\boxed{ \ H_2O_{(g)} \ }$ as water vapor with a gaseous phase.
• $\boxed{ \ H_2O_{(l)}, H_2O_{(s)}, H_2O_{(g)} \ }$ are compounds of the same chemical formula but different phases.

Learn more

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Keywords: which must be, a mixture of substances, solid, liquid, gas, solution, homogeneous, heterogeneous, phase of matter, state, aqueous, salt, water