Solid calcium chloride is added to water. Which answer below describes what happens?
(a) CaCl2 (s) CaCl2(s)
(b) CaCl2 (s) Ca (aq) + Cl2 (g)
(c) CaCl (s) Ca1+ (aq) + Cl1- (aq)
d) CaCl2 (s) Ca2+ (aq) + 2 Cl1- (aq)
(e) Ca2Cl (s) 2Ca2+ (aq) + Cl1- (aq) (
Which of the following compounds are soluble in water? NaCl PbCl2 CaSO4 BaS
(a) NaCl and PbCl2 only (b) NaCl, CaSO4, and BaS only (c) PbCl2 only
(d) NaCl and BaS only (e) all are soluble in water
A solution known to contain one or more of the following cations: Ag+
, Pb2+, Ba2+. A portion of the
solution is tested with HCl(aq) and no precipitate forms. Another portion of the solution is tested with
Na2SO4 and a precipitate forms. Another portion i
Which solution is the most acidic?
(a) 0.10 M Ba(OH)2 (b) 0.10 M LiOH (c) 0.10 M HC2H3O2 (d) 0.10 M NH3 (e) 0.10 M HCl
Which one of the following is the correct net ionic equation for the reaction of hydrofluoric acid with
potassium hydroxide solution?
(a) HF (aq) + KOH (aq) H2O (l) + KF (aq)
(b) HF (aq) + KOH (aq) H2O (l) + KF (s)
(c) HF (aq) + OH1- (aq) H2O (l) + F1-
Which one of the following reactions is a redox reaction?
(a) H+ (aq) + NH3 (aq) NH4+ (aq)
(b) Fe3+ (aq) + 3 OH1- (aq) Fe(OH)3 (s)
(c) 2 Fe (s) + 3 Cl2 (g) 2 FeCl3 (s)
(d) NaNO3 (s) Na+ (aq) + NO31- (aq)
Identify the spectator ions in the reaction of nitric acid with sodium carbonate solution:
(a) water and carbon dioxide
(b) sodium ions and carbonate ions
(c) hydrogen ions and carbonate ions
(d) sodium ions and nitrate ions
(e) hydrogen ion and nitrate i
Which species acts as the oxidizing agent (and becomes reduced) in the following reaction?
16 H+ (aq) + 7MnO4 1- (aq) + 5 NH4+ (aq) 5 NO2 (g) + 7 Mn2+ (aq) + 18 H2O (l)
(b) MnO4 1-
(d) NO2 (e) Mn2+ (f) H2O
Calculate the molarity of a solution made by dissolving 1.74 grams of NaCl in enough water
to make 250.0 mL of solution.
(a) 1.19x10-4 M (b) 0.0297 M (c) 0.119 M (d) 6.94 M (e) 7.43 M
What mass of ethylene glycol, (C2H6O2, MW = 62.07g/mol) must be used to make 500.0 mL of a
solution that has a molarity of 0.100 M ethylene glycol?
(a) 8.06 x 10-4 g (b) 0.0500 g (c) 3.10 g (d) 6.21 g (e) 12.48 g
A 10.0 mL sample of 0.9682 M HCl is diluted to 250.0 mL. What is the concentration of HCl in the
(a) 3.87x10-3 M (b) 0.0387 M (c) 2.42 M (d) 24.2 M
Which one of the following solutions has the greatest concentration of chloride ions?
(a) 0.10 M NaCl (b) 0.20 M KClO4 (c) 0.075 M CaCl2 (d) 0.040 M FeCl3
Calculate the volume of 0.100 M NaOH needed to titrate 50.00 mL of 0.0836 M HCl to the endpoint.
(a) 50.0 mL (b) 41.8 mL (c) 59.8 mL (d) 83.6 mL
What mass of BaCl2 is needed to precipitate all of the silver ions from 25.0 mL of 0.0772 M AgNO3?
(a) 0.201 g (b) 0.333 g (c) 0.402 g (d) 0.804 g (e) 16.1 g
Which one of the following orbitals has a spherical shape?
(a) an s orbital (b) a px orbital (c) a py orbital (d) a px prbital (e) a dxy orbital
Which one of the following subshells can accommodate the largest number of electrons?
(a) 1s (b) 2p (c) 3d (d) 4s (e) 5p
How many unpaired electrons are in the ground state of an atom of bromine?
(a) 0 (b) 1 (c) 2 (d) 5 (e) 7
Using the periodic table as a guide, which one of the following elements has a partially-filled f
(a) 56Ba (b) 66 Dy (c) 76Os (d) 84Po (e) 86Rn
How many valence electrons in an atom of phosphorus? (a) 1 (b) 2 (c) 3 (d) 5 (e) 7
Which one of the following represents a possible excited electronic state for the element chlorine?
(a) [Ne] 3s2 3p6
(b) [Ne] 3p7
(c) [Ne] 3s2 3p5 4s1
(d) [Ne] 3s2 3p4 4s1
(e) [Ne] 3s2 3p6 4s1
(f) [Ar] 4s2 4p5
Experimental evidence for the quantization of electron energies in atoms comes from:
(a) observation of line spectra (b) observation of continuous spectra
(c) existence of family groups of elements (d) existence of transition elements
(e) electrons have a
Which list of types of electromagnetic radiation is in order of decreasing energy ?
(lowest energy to the right)
(a) microwaves > radio waves > ultraviolet light
(b) radio waves > microwaves > ultraviolet light
(c) ultraviolet light > radio waves > microw
How many unpaired electrons are in the ground state of an atom of manganese?
(a) 0 (b) 1 (c) 2 (d) 3 (e) 5 (f) 7
Which one of the following neutral atoms has the largest atomic radius?
(a) B (b) Al (c) Ga (d) Ca (e) Mg
Which of these ions has the smallest ionic radius? (a) K1+ (b) Ca2+ (c) Ga3+ (d) Se2- (e) Br1-
Which of these atoms has the largest first ionization energy? (a) Ar (b) Cl (c) S (d) P (e) Si
Which of these atoms has the largest second ionization energy?
(a) Na (b) Mg (c) Al (d) Si (e) P
How many total electrons reside in s orbitals in the 44Ru2+ cation?
(a) 0 (b) 2 (c) 4 (d) 6 (e) 8 (f) 10
Which of these atoms or ions is not isoelectronic with the other four?
(a) K1+ (b) S2- (c) Cl1- (d) Ar (e) Al3+
Which element is classified as a metalloid? (a) Al (b) Ni (c) As (d) Pb (e) Kr
Which material is an allotrope of ozone? (a) O2 (b) H2O (c) ClO2 (d) N2 (e) Ne
When a Group I metal is placed in water
(a) no chemical reaction occurs.
(b) the solution becomes acidic and hydrogen gas is generated.
(c) the solution becomes basic and oxygen gas is generated.
(d) the solution is neither acidic nor basic and oxygen gas
When the halogens react with Group I metals
(a) the halogen is reduced. (b) the halogen acts as an oxidizing agent. (c) a salt is produced.
(d) the product is water soluble. (e) All of the above are true.