M-Exam 2 Test # NAME
M-Exam 2 test # …………… NAME……..……………......
BIG SCANTRON: 1-Write LAST NAME first, first name last 2-Test number under student ID .
E = RH (1/nf2-1/ni2)
Solubility table
1) The total concentration of ions in a 0.250 M solution of HCl is ______.
A) essentially zero.
B) 0.125 M
C) 0.250 M
D) 0.500 M
E) 0.750 M
2) The net ionic equation for the reaction between aqueous solutions of HF and KOH is ______.
A)
B)
C)
D)
E)
3) What is the concentration (M) of KCl in a solution made by mixing 25.0 mL of 0.100 M KCl with 50.0 mL of 0.100 M KCl?
A) 0.100
B) 0.0500
C) 0.0333
D) 0.0250
E) 125
4) What is the concentration (M) of in a solution prepared by dissolving 11.7 g of in sufficient water to give exactly 230 mL of solution?
A) 11.9
B)
C) 0.0841
D) 1.59
E)
5) There are ______mol of bromide ions in 0.500 L of a 0.300 M solution of .
A) 0.150
B) 0.0500
C) 0.450
D) 0.167
E) 0.500
6) Calculate the concentration (M) of sodium ions in a solution made by diluting 50.0 mL of a 0.874 M solution of sodium sulfide to a total volume of 250.0 mL.
A) 0.175
B) 4.37
C) 0.525
D) 0.350
E) 0.874
7) The wavelength of a photon that has an energy of is ______m.
A)
B)
C)
D)
E)
8) Calculate the energy (J) change associated with an electron transition from n = 2 to n = 5 in a Bohr hydrogen atom.
A)
B)
C)
D)
E)
9) The lowest energy shell that contains f orbitals is the shell with n = ______.
A) 3
B) 2
C) 4
D) 1
E) 5
10) In a hydrogen atom, an electron in a ______orbital can absorb a photon, but cannot emit a photon.
A) 3s
B) 2s
C) 3p
D) 1s
E) 3f
11) is the electron configuration of a(n) ______atom.
A) As
B) V
C) P
D) Sb
E) Sn
12) A 31.5 mL aliquot of of unknown concentration was titrated with 0.0134 M NaOH (aq). It took 23.9 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid was ______.
A) 0.0102
B) 0.00508
C) 0.0204
D) 0.102
E) 0.227
13) Which combination will produce a precipitate?
A)
B)
C) NaOH (aq) and HCl (aq)
D)
E)
14) The lowest orbital energy is reached when the number of electrons with the same spin is maximized. This statement describes ______.
A) Pauli Exclusion Principle
B) Planck's constant
C) deBroglie hypothesis
D) Heisenberg Uncertainty Principle
E) Hund's rule
15) Which set of three quantum numbers (n, l, ml) corresponds to a 3d orbital?
A) 3, 2, 2
B) 3, 3, 2
C) 3, 2, 3
D) 2, 1, 0
E) 2, 3, 3
16) Which one of the following represents an impossible set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms)
A) 2, 1, -1, -1/2
B) 1, 0, 0, 1/2
C) 3, 3, 3, 1/2
D) 5, 4, - 3, 1/2
E) 5, 4, -3, -1/2
17) Which electron configuration represents a violation of the Pauli exclusion principle?
A)
B)
C)
D)
E)
18) The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X?
A) main group element
B) chalcogen
C) halogen
D) transition metal
E) alkali metal
19)An electron in a(n) ______subshell experiences the smallest effective nuclear charge in a many-electron atom.
A) 3f
B) 3p
C) 3d
D) 3s
E) 4s
20)A tin atom has 50 electrons. Electrons in the ______subshell experience the higest effective nuclear charge.
A) 1s
B) 3p
C) 3d
D) 5s
E) 5p
21) The first ionization energies of the elements ______as you go from right to left across a period of the periodic table, and ______as you go from the top to the bottom of a group in the table.
A) increase, increase
B) increase, decrease
C) decrease, increase
D) decrease, decrease
E) are completely unpredictable
22) In which set of elements would all members be expected to have very similar chemical properties?
A) Ca, Sr, Ba
B) N, O, F
C) Na, Mg, K
D) S, Se, Si
E) Ne, Na, Mg
23) Of the hydrogen halides, only ______is a weak acid.
A) HCl (aq)
B) HBr (aq)
C) HF (aq)
D) HI (aq)
E) They are all weak acids.
24)Atomic radius generally increases as we move ______.
A) down a group and from right to left across a period
B) up a group and from left to right across a period
C) down a group and from left to right across a period
D) up a group and from right to left across a period
E) down a group; the period position has no effect
25) Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)?
A) O < F < S < Mg < Ba
B) F < O < S < Mg < Ba
C) F < O < S < Ba < Mg
D) O < F < S < Ba < Mg
E) F < S < O < Mg < Ba
26) Of the choices below, which gives the order for first ionization energies?
A) Cl > S > Al > Ar > Si
B) Ar > Cl > S > Si > Al
C) Al > Si > S > Cl > Ar
D) Cl > S > Al > Si > Ar
E) S > Si > Cl > Al > Ar
27)Which of the following has the largest second ionization energy?
A) Si
B) Mg
C) Al
D) Na
E) P
28) D
