Question

name:

1. state, with a reason, whether each of the following is a homogeneous mixture (solution) or a heterogeneous mixture (mechanical mixture):

a. hotdog relish
b. freshly squeezed grapefruit juice
c. pop
d. apple juice
e. granola
f. vegetable soup

1. give an example of the following:

a pure substance
b. a solid solution
c. a liquid solution
d. a gas solution
e. a mechanical mixture

Explanation:

Part 1: Classifying Mixtures

1a: Hotdog Relish

Step1: Recall Mixture Types

A homogeneous mixture has uniform composition; heterogeneous (mechanical) has non - uniform, visible components.

Step2: Analyze Hotdog Relish

Hotdog relish has visible chunks (e.g., pickle pieces, spices), so it's a heterogeneous (mechanical) mixture.

1b: Freshly Squeezed Grapefruit Juice

Step1: Recall Mixture Types

Homogeneous: uniform; heterogeneous: non - uniform with visible parts.

Step2: Analyze Grapefruit Juice

Freshly squeezed juice has pulp (visible non - uniform parts), so it's a heterogeneous (mechanical) mixture.

1c: Pop

Step1: Recall Mixture Types

Homogeneous mixtures (solutions) have uniform composition at the molecular level.

Step2: Analyze Pop

Pop (soda) has dissolved CO₂, sugar, flavorings etc., uniform throughout, so it's a homogeneous mixture (solution).

1d: Apple Juice

Step1: Recall Mixture Types

Homogeneous: uniform; heterogeneous: non - uniform.

Step2: Analyze Apple Juice

Most commercial or filtered apple juice has uniform composition (no visible pulp), so it's a homogeneous mixture (solution). If unfiltered, it could be heterogeneous, but typically considered homogeneous.

1e: Granola

Step1: Recall Mixture Types

Heterogeneous mixtures have visible, distinct components.

Step2: Analyze Granola

Granola has visible oats, nuts, seeds, etc., so it's a heterogeneous (mechanical) mixture.

1f: Vegetable Soup

Step1: Recall Mixture Types

Heterogeneous mixtures have non - uniform, visible components.

Step2: Analyze Vegetable Soup

Vegetable soup has visible vegetables, so it's a heterogeneous (mechanical) mixture.

Part 2: Examples of Substances/Solutions/Mixtures

2a: Pure Substance

Step1: Define Pure Substance

A pure substance has a fixed composition, either an element or a compound.

Step2: Give Example

Water (H₂O) is a pure substance (compound), or gold (Au) (element).

2b: Solid Solution

Step1: Define Solid Solution

A solid solution is a homogeneous mixture of solids.

Step2: Give Example

Brass (alloy of copper and zinc) is a solid solution.

2c: Liquid Solution

Step1: Define Liquid Solution

A homogeneous mixture where the solvent is liquid.

Step2: Give Example

Salt water (NaCl dissolved in H₂O) is a liquid solution.

2d: Gas Solution

Step1: Define Gas Solution

A homogeneous mixture of gases.

Step2: Give Example

Air (mixture of N₂, O₂, CO₂ etc.) is a gas solution.

2e: Mechanical Mixture

Step1: Define Mechanical Mixture

A heterogeneous mixture with visible components.

Step2: Give Example

Trail mix (nuts, raisins, cereal) is a mechanical mixture.

Answer:

Part 1 Answers:

1a. Heterogeneous (mechanical) mixture - has visible non - uniform components (e.g., pickle chunks).
1b. Heterogeneous (mechanical) mixture - has visible pulp.
1c. Homogeneous mixture (solution) - uniform composition (dissolved components).
1d. Homogeneous mixture (solution) - uniform (assuming filtered, no visible pulp).
1e. Heterogeneous (mechanical) mixture - visible distinct components (oats, nuts, etc.).
1f. Heterogeneous (mechanical) mixture - visible vegetables.

Part 2 Answers:

2a. Example: Water (H₂O) (pure compound).
2b. Example: Brass (copper - zinc alloy).
2c. Example: Salt water (NaCl in H₂O).
2d. Example: Air (N₂, O₂, etc. mixture).
2e. Example: Trail mix (nuts, raisins, cereal).