Flashcards in Chemistry Deck (32):
Mono, di, tri, tetra, penta, hexa
Metal + water
Base + H2
Metal + acid
Ionic compound + H2
Acid + base = salt + water
CxHy + O2 = CO2 + H2O
Reactants = products + heat
Reactants + heat = products
a pure substance composed of 2 or more elements in a fixed ratio
What do the numbers on ionic compound formula tell you?
How many atoms of each element are needed to make the compound neutral
a particle in which atoms are joined by covalent bonds
Covalent bond: how?
- when 2 non-metals bond with each other, both nuclei form strong attractions for the other's electrons
- neither atom attracts electrons strongly enough to pull it away
- result: sharing
___________ arrow _______
Left = reactants
Right = products
What is the law of conservation of mass?
In any given chemical reaction, the total mass of the reactants equals the total mass of the products
Why must we balance chemical equations?
- during chemical reaction, atoms in reactant molecules rearrange to form products
- therefore all atoms that existed in reactants are still present in products because atoms can't be created or destroyed
- to be accurate, we must show that there are equal # of each atom before and after chemical reaction has taken place
- Hydro _________(polyatomic acids)
What does pH scale indicate? What does neutral mean?
- concentration of hydroxide or hydrogen ions
- neutral means that the concentrations are equal and balance each other out
outer shells collide to have a more stable electron arrangement.
Why don't you reduce in molecular?
- ionic: ratio of elements in compound
- molecular: actual # of each atom in molecule (change it and it will be different molecule)
How to neutralize an acid?
add indicator and add base until indicator changes colour
- not conductor
- brittle, not ductile
- Metals: as you go down and left, electron is further from nucleus which means less energy to lose electron
- Nonmetals: stronger P charge, more attractive
# of orbits
# of valence electrons
Attraction between metal cation and non-metal anion
- soluble in water
- turn litmus paper red
- good conductors when dissolves