Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+...
Suppose that some of the iron atoms in the ceramic FeO
are oxidized from Fe 2+ to Fe 3+.
a) Would the net charge of the crystal be positive or
negative?
b) Explain why each of the following defects would or
would not be reasonable to regain charge balance:
O 2- vacancies
O 2- interstitials
Fe 2+ vacancies
Fe 2+ interstitials
c) what ratio of these defects above to Fe 3+ is
needed for charge neutrality ?
d) Ionic materials such as this are often reffered to
as non stoichiometric compounds and have chemical formuals written
in the manner Fe(1-x)O. if the overall formula of an iron oxide is
Fe 0.95 O what percentage of cation sites are Fe 2+, Fe 3+, and
vacancies?
Homework Answers
a) The net charge would be positive
b) O2- vacancies and Fe2+ interstitials would further increase the positive charge.
O2- interstitials and Fe2+ vacancies would regain charge balance
Add Answer to:
Suppose that some of the iron atoms in the ceramic FeO
are oxidized from Fe 2+...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+ to Fe 3+. a) Would the net charge of the crystal be positive or negative? b) Explain why each of the following defects would or would not be reasonable to regain charge balance: O 2- vacancies O 2- interstitials Fe 2+ vacancies Fe 2+ interstitials c) what ratio of these defects above to Fe 3+ is needed for charge neutrality ? d) Ionic materials...
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements 4 Fe(s)...
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements 4 Fe(s) + 3 O2(g) → 2 Fe2O3 2 Fe(s) + 3 O2(9) -2FeO3 Fe(s) + O2(g) – FeO2 Fe(s) + (g) - Feo Fe(s) + 3 O(g) - FeO3
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements Fe(s) +O(g)...
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements Fe(s) +O(g) + Feo Fe(s) + O2(g) + FO2 2 Fe(s) + 3 O2(g) - 2F03 4Fe(s) + 302() -2 70203 Fe(s) + 3 (a) --F03
questions 2-8 Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reacti...
questions 2-8
Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reaction with carbon: 2 Fe,0, + 3 à 4 Fe + 300, (a) How many moles of carbon are needed to react with 7 moles of hematite? (b) How many grams of iron are formed when sufficient carbon reacts with 525 g of hematite? 3. What effect does an increase in the temperature of a gas have on...
BACKGROUND: Synthesis of Potassium Iron (III) Oxalate Hydrate Salt The iron(II) ions from Fe(NH4)2(SO4)2•6H2O will be precipitated as iron(II) oxalate. Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s) The su...
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
please complete the questions has not answering with clarification of the answer to any page Name...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements 4 Fe(s) + 3 O2(g) → 2 Fe2O3 2 Fe(s) + 3 O2(9) -2FeO3 Fe(s) + O2(g) – FeO2 Fe(s) + (g) - Feo Fe(s) + 3 O(g) - FeO3
Select the balanced chemical equation for the synthesis of iron(III) oxide from its elements Fe(s) +O(g) + Feo Fe(s) + O2(g) + FO2 2 Fe(s) + 3 O2(g) - 2F03 4Fe(s) + 302() -2 70203 Fe(s) + 3 (a) --F03
questions 2-8
Cuso. AI (SO.), + Cu Al + Type 2. Iron metal can be produced from the mineral hematite (Feo) by reaction with carbon: 2 Fe,0, + 3 à 4 Fe + 300, (a) How many moles of carbon are needed to react with 7 moles of hematite? (b) How many grams of iron are formed when sufficient carbon reacts with 525 g of hematite? 3. What effect does an increase in the temperature of a gas have on...
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
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