Science Class: Mixtures and Chemical Changes

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Questions and Answers

Which of these options describes a homogeneous mixture?

A mixture of salt and water (correct)
A mixture of oil and water
A mixture of flour and water
A mixture of sand and water

A physical change results in the formation of a new substance.

False (B)

What is the name given to the substance that is dissolved in a solvent?

Solute

The ______ is the substance present in the largest amount in a solution.

<p>solvent</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Mixture = A substance that dissolves in a solvent Solubility = A change that produces a new substance Chemical Change = A measure of how much solute dissolves in a solvent Solute = Two or more substances combined together</p> Signup and view all the answers

Flashcards

Solution

A mixture where the substances are evenly distributed throughout, making it appear uniform.

Solvent

The substance that dissolves another substance in a solution.

Chemical change

A change in matter where a new substance is formed with different properties.

Physical change

A change in matter where the substance's appearance or form changes, but it remains the same substance.

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Solute

The substance that gets dissolved in a solvent to form a solution.

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Study Notes

Types of Mixtures

Mixtures are made of two or more substances in the same place
Heterogeneous mixtures have small, undissolved particles that do not separate or settle
Homogeneous mixtures have particles that are easy to see and separate via filtration

Types of Solutions

Solvent is the substance in the largest amount in a solution
Solute is the substance dissolved in the solvent

Solubility

Solubility is the amount of solute that can dissolve in a solvent

Chemical Changes

A chemical change alters the form or appearance of a substance without changing its substance type
Chemical changes produce one or more new substances

Energy Changes in Chemical Reactions

Exothermic reactions release more energy than they require to break
Endothermic reactions require more energy to break the bonds than is released by the formation