Chemical Reactions Flashcards
What is an exothermic reaction?
When heat is given out
How do you know a chemical reaction has taken place?
There is a colour change, gas given off, a solid has formed or a heat change
What is a compound?
When two or more elements have reacted together to form something new
What does soluble mean?
A substance that dissolves
What does solvent and solute mean?
A solvent is when the liquid does the dissolving and a solute is when the solid does the dissolving
What causes different flame colours?
The metal of a compound
What increases the rate of a chemical reaction?
Increasing concentration or temperature Or decreasing particle size
What is a fair test?
A fair test is when all of the factors are the same except for the one being tested
What is residue?
The solid left in the filter paper
What is filtrate?
The liquid that has passed through the filter paper
What is distillation used for?
To separate two liquids or a liquid with a solid dissolved in it
If there is a smaller particle size there is a…
Larger surface area
What is an endothermic reaction?
When heat is taken in
What is a mixture?
When things are mixed together and can be separated- are not chemically joined
Give examples of mixtures
Sugar dissolving in tea
Air
