Bonding Types
Name one property of a substance with metallic bonding.
Possible answers: Solid, bendable, malleable, conducts electricity, insoluble
Based on their placement on the periodic table, which element is more electronegative, Cesium of Indium?
Indium
What is the defining characteristic of an element, that when it is changed, the identity of the element is changed?
protons
In order to balance an equation, what gets added/changed?
Coefficients
Is this equation represent a physical change or chemical change?
CuSn(s) --> CuSn(l)
(l) = liquid
Physical
How many molecules are in one mole?
6.02 x 1023
What is happening to the electrons in an ionic bond?
Transferred from a metal to a nonmetal.
What small molecule shape has 3 bonds and NO lone pairs?
trigonal planar
Why would hydrogen prefer to bond with oxygen rather than sulfur?
Because oxygen is more electronegative.
What law is used in order to balance equations?
Conservation of Matter
How do you know if an equation represents a chemical change?
New products are formed
Right side is arranged differently than left.
What is the name for 6.02x1023?
Avogadro's Number
molecular covalent
If one element has an electronegativity value of 3.10, and another element has an electronegativity of 2.30, what type of bond do they share?
Polar covalent bond
What "need" is being satisfied when atoms bond?
Fill the valence shell with 8 electrons.
Balance the following equation:
Na2SO4 + CuCl2 --> NaCl + CuSO4
Na2SO4 + CuCl2 --> 2NaCl + CuSO4
Classify this equation:
2KCl + 3O2 --> 2KClO3
Synthesis/Combination
What is the molar mass of calcium? (must have proper units)?
40.0 g/mol
What type of bonding does CuZn have?
metallic
Is H2Se polar or nonpolar? How do you know?
yes, because it has a bent shape
What is the purpose of Avogadro's Number?
Possible Answers: It makes the number of molecules tangible. -OR-
Aligns molar mass with atomic mass on the periodic table.
Balance the following equation:
C5H12 + O2 = CO2 + H2O
C5H12 + 8O2 = 5CO2 + 6H2O
Classify this equation:
KCl + AgNO3 --> KNO3 + AgCl
Cl = Chlorine
Double Replacement
What is the molar mass of Cu(OH)2?
97.54 g/mol
Work: 63.54 + (16.0 + 1.0)*2
What attribute does a substance with network covalent bonding has that causes it to be insoluble?
Valence Electrons shared in a gridlike network, not allowing water to separate the particles.
Is C2H2 polar or nonpolar? How do you know?
nonpolar, the shape is linear, so the polar bonds are equal in strength and opposite in direction.
Why do substances with metallic bonds conduct electricity?
Metallic substances have a sea of electrons that allows them to flow through freely.
Balance the following equation:
KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2
(This one is very challenging. You will not see one this difficult on the test.)
2KMnO4 + 16HCl = 2KCl + 2MnCl2 + 8H2O + 7Cl2
Classify this equation:
Zn + CuSO4 --> Cu + ZnSO4
Single replacement
How many pennies are in 2.5 moles of pennies (answer MUST be in CORRECT scientific notation)?
1.5x1024 pennies