Compounds/Acids Flashcards
What are ionic compounds?
- They are made up of metallic and non-metal ions
- Electrostatic charges hold them together as they exchange electrons
- Ionic bonds = exchange of electrons
- A ratio
- Form crystal lattice, regular crystal shapes with flat sides
- Solids at Standard Atmospheric Temperature and Pressure
- Electrolytes when dissolved in water and soluble; not conductive when solid
- High melting points due to strong bonds
What are molecular compounds?
- Made up of non-metal atoms that share valence electrons
- Covalent bonds, and they share electrons
- Attraction of electrons to neighbouring nuclei; holds atoms together
- Neutral overall. The chemical formula tells us how many of each atom is involved.
- No ions since no election transfer
- Strong intermolecular bonds
- Non-electrolytes
- Low melting points due to intermolecular bonds
- Some are soluble and exist in all states
What are acids?
Hydrogen (H+) contains ionic compounds with unique chemical properties when dissolved in water.
There is a special way to name acids = aqueous (aq)
What is the chemical formula for water?
H2O (l)
What is the chemical formula for ammonia?
NH3 (g)
What is the chemical formula for methane?
CH4 (g)
What is the chemical formula for ethane?
C2H6 (g)
What is the chemical formula for sucrose?
C12H22O11 (s)
What is the chemical formula for glucose?
C6H12O6 (s)
What is the chemical formula for methanol?
CH3OH (l)
What is the chemical formula for ethanol?
C2H5OH (l)
What is the chemical formula for hydrogen peroxide?
H2O2 (l)
What is the chemical formula for ozone?
O3 (g)
Which elements are diatomic?
(how they are found in nature) Br2 (l), I2 (s), N2 (g), Cl2 (g), H2 (g), O2 (g), F2 (g), At2 (s)
Which elements are polyatomic?
P4 (s), S8 (s)