Chapter 3 & Chapter 4: Elements, Compounds and Mixtures, Solution and Suspensions and Separating Mixtures Flashcards
Define elements.
Elements are the basic building blocks of living and non-living matter. They cannot be broken down into simpler substances.
Define compounds.
They consist of 2 or more elements that are chemically combined together.
What are the characteristics of compounds?
They do not have the same properties as their constituent elements. The constituent elements of a compound are always chemically combined in a fixed proportion by mass. A compound cannot be separated into its constituent elements easily, it would need alot of energy to break it down.
Define mixture.
A mixture consists of two or more elements and/or compounds that are not chemically combined together
What are the characteristics of mixtures?
They have the same characteristics as their constituents. The constituents of a mixture can be separated easily and do not have a fixed proportion.
What is a solution?
A solution is a mixture in which one substance dissolves completely in another substance.
The substance that dissolves is called the ______
solute
The substance in which the solute dissolves in is called the ______
solvent
With a fixed volume of water, a solution with a low percentage of dissolved solute, it is known as a ___________. A solution with a high percentage of dissolved solute is known as ____________
dilute solution, concentrated solution
What is rate of dissolving?
It refers to how quickly the solute dissolves in a solvent.
What factors affect rate of dissolving?
Temperature of solvent, size of solute particles and rate of stirring.
What is solubility?
It refers to how well a solute dissolves in a fixed volume of a particular solvent.
What factors affect solubility?
Type of solute, type of solvent, temperature of solvent.
Define suspension.
It is a mixture that contains insoluble substances in a solvent.
What are the characteristics of a solution?
- Particles of the solute cannot be seen
- Solute does not settle to form solid deposits
3.Light can pass through fully - Cannot separate via filtration.
- Homogenous
What are the characteristics of a suspension?
- Insoluble substance can be seen
- Insoluble substances can settle to form solid deposits
- Light cannot pass through fully.
- Can separate via filtration.
- Heterogenous