Question

Identify at least five (5) pure substances found in nature, in the supermarket,
grocery store and even at your home. Use the table below to explain your answer
based on appearance, separating techniques, boiling and melting point.
Pure Appearance
1.
2.
3.
4.
5.
(Homogeneous
or
Heterogeneous)
1.
2.
3.
4.
5.
Substances
Separating
Techniques
(Components
can be
separated or
inseparable)
1.
2.
3.
4.
5.
Boiling point
(Fixed
temperature or
temperature
different in
different times)
1.
2.
3.
4.
5.
Melting point
(Melts
completely and
smoothly or a
portion does not
melt)
1.
2.
3.
4.
5. ​

Answer 1

Answer:

PURE SUBSTANCES:

1.SUGAR(SUCROSE)

2.SALT

3.OIL AND WATER

4.CRYSTALL

APPEARANCE

1.HOMOGENOUS

2.HOMOGENOUS

3.HETEROGENOUS

4.HOMOGENOUS

SEPARATING TECHNIQUES

1.CAN BE SEPARATED

2.INSEPARABLE

3.CAN BE SEPARATED

4.INSEPARABLE

BOILING POINT

1.FIXED TEMPERATURE

2.FIXED TEMPERATURE

3.A PORTION DOES NOT MELT

4.FIXED TEMPERATURE

Explanation:

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Answer 2

Everything that exists on Earth is a form of matter, which is further defined as any substance that occupies space and has mass. The matter is further divided into different forms such as solid, liquid, and gas. In addition, it is also classified as pure substances and mixtures.

An element is a pure substance because it cannot be broken down or transformed into a new substance either by physical or chemical means. Elements are mostly metals, non-metals, or metalloids.

Compounds, on the other hand, are also pure substances when two or more elements are chemically combined in a fixed ratio. However, these substances can be broken down into separate elements using chemical methods.

Characteristics and properties of pure substances:

• Pure substances are mostly homogeneous in nature and contain only one type of atom or molecule.
• These substances mainly have a constant or uniform composition.
• Substances have fixed boiling and melting points.
• A pure substance usually participates in a chemical reaction to produce predictable products.

Examples of pure substances:

All elements are mostly pure substances. Some of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds like water, salt or crystals, and baking soda, among others, are also grouped as pure substances.

PURE SUBSTANCES:

1. SUGAR (SUCROSE)

2. SALT

3. OIL AND WATER

4. CRYSTAL

APPEARANCE

1. HOMOGENEOUS

2. HOMOGENEOUS

3. HETEROGENEOUS

4. HOMOGENEOUS

SEPARATION TECHNIQUES

1. CAN BE SEPARATE

2. INSEPARABLE

3. CAN BE SEPARATE

4. INSEPARABLE

THE BOILING POINT

1. FIXED TEMPERATURE

2. FIXED TEMPERATURE

3. PART IS NOT FLOWING

4. FIXED TEMPERATURE

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