Writing Ionic equations
Write the balance chemical equation for aluminum reacting with Iodine.
2Al + 3I2 --> 2AlI3
(s) (g) (s)
Expected Mistake(s):
1. You forgot about diatomic elements!
2. You put the wrong charge on either Al or I!
Define solvent
substance that dissolves a solute to form a solution
How many domains does water have?
Describe 2 properties of ionic compounds.
Hard, Brittle, and high melt/boiling points
How many sigma and pi bonds are in a triple bond?
1 sigma and 2 pi
Write the complete Ionic equation for sodium carbonate and Iron(II) chloride.
Na2+ (aq) + CO32- (aq) + Fe2+ (aq) + Cl2 (aq) --> 2Na+ (aq) + 2Cl- (aq) + FeCO3 (s)
Expected mistake(s):
1. Did not write correct charges
2. Did not write correct state of matters
3. You balanced incorrectly
Describe Electron domain
Region in which electrons are likely to be found. This can be both bonds and lone pairs but, only around the central atom.
What is the molecular shape of SiS2?
Linear
Trigonal pyramid and it is polar.
Write the greek numerical prefixes between 1-10.
1 is Mono 2 is Di
3 is Tri 4 is Tetra
5 is Penta 6 is Hexa
7 is Septa 8 is Octa
9 is Nona 10 is Deca
Write the complete molecular equation for ammonium phosphate and zinc nitrate.
2(NH4)3PO4 (aq) + 3Zn(NO3)2 (aq) --> 6NH4NO3 (aq) + Zn3(PO4)2 (s)
Expected mistake(s):
1. Did not have the correct polyatomic ions and charges
2. Balanced incorrectly
3. Incorrect state of matter(s)
A bond or molecule whose ends have opposite charges. It is represented with a crossed arrow.
What is the molecular shape of BH3?
Trigonal plane. This is a exception to the octet rule because only 6 electrons are available leaving boron to have a suboctet.
Which is more polar: hydrogen and phosphate or hydrogen and carbon?
Hydrogen and carbon, this is because carbon is more electronegative therefore the pull is stronger.
What is the difference between a ionic, covalent, and metallic compound?
A metallic compound includes two metals
A ionic compound includes one metal and one nonmetal
A covalent compound includes two nonmetals
Write the balanced chemical equation for Nitric acid (HNO3) with Barium Hydroxide.
2HNO3 + Ba(OH)2 --> Ba(NO3)2 + 2H2O
(aq) (aq) (aq) (l)
Expected mistake(s):
1. You balanced incorrectly
2. You put the incorrect state of matter for water
Describe dissociation
Dissociation occurs when a ionic compound is placed in water and the molecule splits. This makes the the compound aqueous
What are the molecular shapes of C2H2?
Two linear shapes. This is because there are multiple of the central atom (in this case Carbon) which makes two geometries.
When does a ionic compound have electrolytes?
When it is molten or inaqueous.
What greek letter and mathematical symbols represents the polarity on a dipole?
Delta or δ with a + or -
Write the Net Ionic Equation for Lithium Hydroxide and Barium Chloride.
Expected mistake:
1. Didn't read the chart correctly
Define resonance
condition that occurs when there is more than one valid Lewis structure for the same molecule
What are the molecular shapes of CH3OH?
Tetrahedral and Bent. This because there are two geometries one including Oxygen and a hydrogen, one including carbon and three hydrogen.
What is the molecular shape and polarity of carbon dioxide?
Linear, nonpolar
Define hybridization.
process by which atomic orbitals mix to form new, identical hybrid orbitals.