Chapter 2 - Chemical Reactions And Energy Changes Flashcards
What is conservation of mass
Atoms cannot be created nor destroyed
Why does mass increase/decrease in a reaction
Change in state. Gas is lowest mass, liquid is mid and solid is highest mass
What is the formula of mass
The sum of all the atomic masses of all atoms in the formula
What is the limiting reactant
The reactant that will run out first
What is the opposite to the limiting reactant
The element that won’t run out therefore has excess
List the reactivity series
- Potassium
- Sodium
- Lithium
- Calcium
- Magnesium
- Aluminium
- Zinc
- Iron
- Tin
- Lead
- Copper
- Silver
- Gold
How are the metals without carbon extracted
Electrolysis
What is oxidation
When oxygen is gained
What is reduction
When oxygen is lost
What is a displacement reaction
When a more reactant substance takes the place of a less reactive one
When dissolved in water, what do acids release
H+
When dissolved In water what do alkalis release
OH-
What PH is acidic, neutral and alkaline
PH 1 - Acidic
PH 6/7 - Neutral
PH 14 - Alkaline
What is a salt
When a metal and acid reacts. The mental takes the place of Hydrogen in the acid
