Chemistry Flashcards
What is a particle?
Only one type of particle (atom or molecule) that possesses its own properties
What is an element?
A pure substance made up of only one type of atom
What is a compound?
A pure substance made up of two or more types of atoms combined
When is a solution saturated?
When no more solute can be dissolved at a specific temperature
What is the point of solution?
When the solution is saturated (when no more solute can be dissolved at a specific temperature)
What is solubility?
The property that indicates the maximum amount of solute that can be dissolved into a given volume of solvent to make a saturated solution
What must solubility be measured at?
A specific temperature and atmospheric temperature
What is solubility measured in?
Pressure
The warmer the solvent is the _____ it dissolves.
Greater
Why does the solvent more soluble at higher temperatures?
The more heat the particles have, the more mobile they become, leaving more spaces between them to be filled out by solute particles
What are physical changes?
When the appearance of a substance is changed without changing its nature.
Name some examples of physical changes?
Phase change
Ripping/crumpling paper
Dissolution
Scrambling an egg
What is a phase change?
When a substance changes from one state to another
What are chemical changes?
When two or more substances called reactants, interact to create new substances called products
What are some indications of a chemical change?
Heat or light produced Colour change Irreversible Smoke (gas) Precipitate (solid which forms at the bottom)
