Reactions!
Ionic Equations/Energy
Lewis Structures & Everything In-Between!
Configurations!
Random!
100
Give the name of the following reaction:
C --> A + B
Decomposition Reaction
100
What is the frequency of violet light with a wavelength of 400 nm?
7.50 x 1014 Hz
100
What is the octet rule? What exceptions are there?
Octet Rule - all elements need 8 electrons surrounding them
Exceptions: H (only needs 2), Cr, Cu, etc.
Exceptions: Anything bonded with F can have more than 8 electrons
100
What orbitals do we use for electron configurations?
s,p,d,f
100
Arrange the following elements in order of increasing atomic size:
Na, P, Zr, Cs, Pt
P < Na < Zr < Pt < Cs
200
Is the following a redox reaction? If so, how do you know?
Zn + Cu2+ ---> Zn2+ + Cu
It is a redox reaction due to the oxidation #'s changing for each element.
200
What is the energy of a photon if its frequency is 1.5 x 1015 Hz?
9.939 x 10-19 J
200
Draw the Lewis structure of the following:
SbCl52-
200
Which of the following has 2 unpaired electrons?
Magnesium
Silicon
Chlorine
Cesium
Silicon
200
Determine whether the following are ionic, polar covalent or nonpolar covalent. If they are polar, show which is partially positive and which is partially negative.
a) Si--O
b) Si--K
c) K--O
d) O--O
a) polar covalent (Si +, O -)
b) polar covalent (Si +, K -)
c) ionic
d) nonpolar covalent
300
What is the name of a rapid reaction that produces a flame as well as carbon dioxide and water?
Combustion Reaction
300
What is the net ionic equation of the following?
MgCl2(aq) + AgNO3(aq) --> AgCl (s) + Mg(NO3)2(aq)
Ag+(aq) + Cl-(aq) -->AgCl (s)
300
How do you identify a resonance structure?
If the Lewis structure can change without altering formal charges.
300
What are the four quantum numbers for the 3rd d electron in Vanadium?
n = 3
l = 2
ml = 0
ms = +1/2
300
Which of the following groups have only strong acids/bases?
a) KOH, HI, XeF4
b) HI, HCl, KOH
c) HClO4, Ba (OH)2, H2O
B: HI, HCl, KOH
400
Give the classification of the following reaction:
Ca(OH)2(aq)+2HBr(aq)⟶CaBr2(aq)+2H2O(l)
An acid-base (neutralization) reaction.
400
From this balanced molecular equation, write the net ionic equation for:
Pb(NO3)2(aq) + H2SO4(aq) --> PbSO4(s) + 2HNO3(aq)
Pb2+(aq) + SO42-(aq) --> PbSO4(s)
400
How many resonance structures does the carbonate ion have?
3
400
Using lines and arrows, draw the electron configuration of the valence electrons for Xe.
[Kr] 4d¹⁰ 5s² 5p⁶ (Hint for lines)
400
How much ZnCl2 can be produced from the reaction of 2.0 mol of Zn and 3.0 mol of HCl? Which is the limiting reactant?
Zn + 2HCl --> ZnCl2 + H2
1.5 mol ZnCl2 can be produced, with HCl being the limiting reactant.
500
Give the definition of a precipitation reaction.
Cations & anions coming together to form an insoluable ionic compound.
500
An electron is excited from the n = 2 shell to the n = 4 shell.
a) Is energy released or absorbed?
b) What is the wavelength of radiation involved?
c) Which region of the electromagnetic spectrum does this radiation reside?
a) Absorbed
b) 486 nm
c) Visible Light
500
Draw the Lewis Structure, identify electron domain geometry & molecular geometry, determine formal charges, and indicate whether the following ion is polar or non-polar.
CO32-
Resonance Structure
EDG: Trigonal Planar
MG: Trigonal Planar
Nonpolar
500
If an element's last valence electron has these four quantum numbers: n = 6, l = 1, ml = +1, ms = +1/2, what is the identity of the element?
Bismuth
500
Titanium metal requires a photon with a minimum energy of 6.84 x 10-19 J to emit electrons via the photoelectric effect. What is the wavelength of radiation with this energy?
286 nm