Heterogeneous Mixture - Homogeneous Mixture Worksheet - Easy Hard ... - Free Printable

It looks like you've uploaded a worksheet titled "Heterogeneous Mixture - Homogeneous Mixture Worksheet", and the task is to classify each of the following as either a compound, a homogeneous mixture, or a heterogeneous mixture.

Here’s the list from the worksheet:

a) pure silver ring
b) sugar water
c) pure magnesium oxide (MgO)
d) air, containing O₂ and N₂
e) soil
f) sand stirred in water

Let’s go through each one step by step and classify it correctly. I’ll explain the reasoning for each.

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Definitions:

- Compound: A substance formed when two or more elements are chemically bonded in a fixed ratio. It has a uniform composition throughout.
- Homogeneous Mixture: A mixture with uniform composition throughout; the components are evenly distributed at the molecular level (e.g., solutions).
- Heterogeneous Mixture: A mixture where the components are not uniformly distributed; you can see different parts or phases.

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Now let's classify each:

#### a) Pure silver ring
- This is made of pure silver (Ag), which is an element.
- Since it's not a mixture and not chemically combined with other elements, it is not a compound.
- But since it's pure, it's not a mixture at all.
- However, if the question expects classification among these three, pure substances like elements or compounds are separate categories.

But in this context, pure silver is not a mixture, so it should be classified as:
> ✔ Element — but since that’s not an option, and assuming "pure" means not mixed, then it's neither a mixture nor a compound.

Wait — the instruction says: *"Describe the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture."* So yes, element is acceptable.

But looking at the options listed on the worksheet, only compound, homogeneous mixture, and heterogeneous mixture are given? Wait — actually, the prompt says:

> "Describe the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture."

So element is an allowed category.

Therefore:
> ✔ a) Pure silver ring → Element

*(Note: Silver is an element, and a pure ring made of silver is a pure elemental sample.)*

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#### b) Sugar water
- Sugar (sucrose) is dissolved in water.
- The mixture is uniform throughout — you can’t see sugar particles.
- It’s a solution, which is a type of homogeneous mixture.

> ✔ b) Sugar water → Homogeneous mixture

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#### c) Pure magnesium oxide (MgO)
- MgO is a chemical compound formed from magnesium and oxygen in a 1:1 ratio.
- It's chemically bonded — not just physically mixed.
- It has a fixed composition.

> ✔ c) Pure magnesium oxide (MgO) → Compound

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#### d) Air, containing O₂ and N₂
- Air is mostly nitrogen (N₂) and oxygen (O₂), along with small amounts of other gases.
- These gases are physically mixed, not chemically bonded.
- The composition is uniform throughout (assuming well-mixed).

> ✔ d) Air → Homogeneous mixture

*(Even though it contains multiple gases, it’s a solution of gases — hence homogeneous.)*

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#### e) Soil
- Soil is composed of various materials: sand, silt, clay, organic matter, etc.
- You can see different textures and components.
- Not uniformly distributed.

> ✔ e) Soil → Heterogeneous mixture

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#### f) Sand stirred in water
- Sand does not dissolve in water.
- When stirred, sand may suspend temporarily, but it will settle.
- You can clearly see the sand particles and water — two distinct phases.

> ✔ f) Sand stirred in water → Heterogeneous mixture

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✔ Final Answers:

| Item | Classification |
|------|----------------|
| a) Pure silver ring | Element |
| b) Sugar water | Homogeneous mixture |
| c) Pure magnesium oxide (MgO) | Compound |
| d) Air, containing O₂ and N₂ | Homogeneous mixture |
| e) Soil | Heterogeneous mixture |
| f) Sand stirred in water | Heterogeneous mixture |

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📝 Notes:

- Pure substances (elements and compounds) are not mixtures.
- Mixtures can be homogeneous or heterogeneous.
- Solutions (like sugar water and air) are homogeneous mixtures.
- Suspensions (like sand in water) are heterogeneous mixtures.

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