Question

9. Explain the term 'mixture. Differentiate between homogeneous & heterogeneous mixtures. State why brass is considered as a homogeneous mixture while a mixture of iron & sulphur - heterogeneous. Give an example of two liquids which form a) homogeneous b] heterogeneous - mixtures.​

Answer 1

Explanation:

SuspensionSolvent(i) It has uniform compos ition.It does not have a uniform compos ition.(ii) No vis ible boundaries of s eparation.Shows vis ible boundaries of separation.(iii) They cons is t of only one phase.They cons is t of more than one phase.Example: sugar + water

→ sugar s olution.Example: s ugar + s and

Answer 2

Explanation:

MIXTURE is a combination of two or more substances that are not chemically united and do not exist in fixed proportions to each other. Most natural substances are mixtures.

In the graphic on the left there are four substances - water, alcohol, oil, and food color dye.

MIXTURES

PURE COMPOUNDS

A mixture can be physically separated into pure compounds or elements. A pure compound has a constant composition with fixed ratios of elements.

Just about everything that you can think of is probably a mixture. Even the purest of materials still contain other compounds as impurities. Although it is almost physically impossible to isolate absolutely pure substances, a substance is said to be pure if no impurities can be detected using the best available analytical techniques.

Mixtures may exhibit a changing set of physical properties.

For example, mixture of alcohol and water boils over a range of temperatures.

Physical properties such as boiling point or melting point of pure substances are invariant.

For example, pure water boils at 100 degrees C

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