Classify the following as homogeneous or heterogeneous mixtures, or pure we is a pure substance, whether it is an element or a
Mixture: Homogeneous Substance
Heterogeneous Pure substance
Element companie
2.1 Sugar
2.2 Magnesium ribbon
2.3 Vegetable soup
2.4 Bath oil
2.5 Tin of assorted biscuits
2.6 Peanuts and raisins
2.7 Copper wire
2.8 Bicarbonate of soda (Baking soda)
The Correct answer and Explanation is:
To classify the given items, we need to understand the distinctions between homogeneous mixtures, heterogeneous mixtures, pure substances, elements, and compounds.
- Homogeneous Mixtures: These are uniform mixtures where the composition is consistent throughout, meaning that you cannot distinguish different components with the naked eye. An example is a saltwater solution.
- Heterogeneous Mixtures: These mixtures contain visibly different substances or phases. The composition can vary throughout the mixture, and components can often be separated physically. For example, a salad or a mixture of nuts and raisins.
- Pure Substances: These are materials with a consistent composition and distinct properties. They can be classified as elements or compounds:
- Elements: These are substances that cannot be broken down into simpler substances by chemical means (e.g., magnesium, copper).
- Compounds: These consist of two or more elements chemically bonded together (e.g., bicarbonate of soda).
Classification of Given Items:
- Sugar: Pure substance (compound)
- Magnesium ribbon: Pure substance (element)
- Vegetable soup: Heterogeneous mixture
- Bath oil: Homogeneous mixture
- Tin of assorted biscuits: Heterogeneous mixture
- Peanuts and raisins: Heterogeneous mixture
- Copper wire: Pure substance (element)
- Bicarbonate of soda (Baking soda): Pure substance (compound)
Explanation:
- Sugar (sucrose) is a compound made up of carbon, hydrogen, and oxygen atoms. It has a definite composition and distinct properties, making it a pure substance.
- Magnesium ribbon is an elemental form of magnesium, which cannot be broken down further, thus it is classified as a pure substance.
- Vegetable soup contains various ingredients that remain distinct and can be separated, classifying it as a heterogeneous mixture.
- Bath oil consists of a blend of oils that are uniformly mixed, making it a homogeneous mixture.
- A tin of assorted biscuits contains different types of biscuits that can be seen and distinguished, thus it is a heterogeneous mixture.
- Peanuts and raisins form a mixture where each component is identifiable, categorizing it as heterogeneous.
- Copper wire is pure copper, an element with a consistent composition.
- Bicarbonate of soda (sodium bicarbonate) is a compound composed of sodium, hydrogen, carbon, and oxygen, qualifying it as a pure substance.
Understanding these classifications helps in various scientific applications, such as determining properties, behaviors, and reactivity in different contexts.