Chemical Reactions Flashcards
1
Q
4 Signs that a chemical reaction has happened?
A
Effervescence ( gas released), colour change, temperature change, precipitation (solid formed)
2
Q
What is an Exothermic reaction
A
A reaction which releases energy ergo warm/hot to touch
3
Q
What is an Endothermic reaction?
A
A reaction which absorbs heat ergo feels colder
4
Q
What can make the rate of reaction quicker?
A
Higher concentration, Smaller particle size, Increase in temperature, Catalyst
5
Q
What can slow down the rate of reaction?
A
Lower Concentration, Big particle size, Decrease in temperature
6
Q
What is a catalyst?
A
A catalyst is any chemical that speeds up a reaction without being used up. Also it will still be the same at the end of reactions
