Topic 3 Flashcards
What is the volume of carbon dioxide produced from the complete reaction of 0.10 mol of nitric acid at room temperature and pressure?
[1 mol of any gas occupies 24 dm3 at room temperature and pressure.]
a) 1.2
b) 1.8
c) 2.4
d) 3.6
a
In which of the following reactions is sulfuric(IV) acid, H2SO3, acting as an oxidizing agent?
a) H2SO3 + H2O –> H3O+ + HSO3–
b) H2SO3 –> SO2 + H2O
c) H2SO3 + 2FeCl3 + H2O –> 2FeCl2 + H2SO4 + 2HCl
d) H2SO3 + 2H2S –> 3H2O + 3S
d
Which of the following is a redox reaction?
a) Cr2O72– + 2OH– –> 2CrO42– + H2O
b) [Cu(H2O)6]2+ + 4Cl– –> [CuCl4]2– + 6H2O
c) 4OH– + 4MnO4– –> 4MnO42 – + 2H2O + O2
d) [Fe(H2O)6]3+ + 3OH– –> [Fe(H2O)3(OH)3] + 3H2O
c
The oxidation state of nickel is not +2 in
a) [Ni(CO)4]
b) [Ni(H2O)4(OH)2]
c) [Ni(NH3)6]2+
d) [Ni(CN)4]2–
a
The thermite reaction, shown below, is a useful industrial process.
Fe2O3(s) + 2Al(s) 2Fe(l) + Al2O3(s)
a) disproportionation
b) oxidation
c) redox
d) reduction
d
In nitric acid, HNO3, the oxidation number of nitrogen is +5
This means that the nitrogen in nitric acid
a) has 5 electrons in its outer shell
b) is an ion with a +5 charge
c) would have a charge of +5 if its bonding electrons were transferred completely
d) forms 5 covalent bonds in total
c
The equation representing the reaction between copper(II) oxide and dilute sulfuric acid is
CuO(s) + H2SO4(aq) –> CuSO4(aq) + H2O(l)
The ionic equation for the reaction is
a) Cu2+(s) + SO42 (aq) –> CuSO4(aq)
b) O2 (s) + H2SO4(aq)H2O(l) + SO42 (aq)
c) CuO(s) + 2H+(aq)Cu2+(aq) + H2O(l)
d) CuO(s) + H2SO4(aq)Cu2+SO42 (aq) + H2O(l)
c
When solutions of iodine are titrated with aqueous sodium thiosulfate solution, Na2S2O3(aq), the thiosulfate ions are oxidized to A S2O42– B S2O62– C S2O82– D S4O62–
c/b
Which of these reactions is not a redox reaction? A Mg(NO3)2(s) → MgO(s) + 2NO2(g) + ½O2(g) B HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) C Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s) D Cl2(aq) + 2Br–(aq) → 2Cl–(aq) + Br2(aq)
b
Iodine can react with sodium hydroxide solution to form NaIO3(aq), according to the equation below.
3I2(aq) + 6NaOH(aq) → 5NaI(aq) + NaIO3(aq) + 3H2O(l)
Which of the statements about the reaction is false?
a) The oxidation number of some iodine atoms goes up.
b) At high temperatures NaIO(aq) also forms.
c) Sodium ions are spectator ions.
d) The oxidation number of some iodine atoms goes down.
b
When aqueous solutions of barium chloride and potassium sulfate are mixed, a white precipitate forms. The ionic equation for the reaction is
a) K+(aq) + Cl-(aq) –> KCl(s)
b) K2+ (aq) + 2Cl-(aq) –> KCl2(s)
c) Ba+(aq) + SO4-(aq) –> BaSO4(s)
d) Ba2+ (aq) + SO4 2-(aq) –> BaSO4(s)
d
Which of the following is a redox reaction? A Ca + 2H2O --> Ca(OH)2 + H2 B MgO + H2O --> Mg(OH)2 C NaCl + AgNO3 --> AgCl + NaNO3 D Na2CO3 + 2HCl --> 2NaCl + CO2 + H2O
a
In which of the following reactions is sulfuric(IV) acid, H2SO3, acting as an oxidizing agent?
A 2NaOH + H2SO3 –> Na2SO3 + 2H2O
B 2FeCl3 + H2SO3 + H2O –> 2FeCl2 + H2SO4 + 2HCl
C 2H2S + H2SO3 –> 3H2O + 3S
D H2SO3 –> H2O + SO2
c
