Answer the following chemistry question: 3. (a) The pKa for ferric ion Fe(+3) is 2. The pKa for...

Answer the following chemistry question:

3. (a) The pKa for ferric ion Fe(+3) is 2. The pKa for cupric ion Cu(+2) is 9.

Which is a stronger Bronsted acid? Give and explain two reasons for the ten million-fold difference in their acidities

b) The K_sp for silver tarnish, that is the black Ag₂S, is 10^-39, one of the smallest values indicating a VERY insoluble solid. Why is silver sulfide so insoluble?

Expert Solution

queen_honey_blossom answered 1 year ago

Chemistry 2 Lab question! How is sulfate ion seperated from NO3 - and Cl - ?

In the reaction: Fe^3+ + SCN^− ⇌ [Fe(NCS)]2+ The initial concentration of Fe^3+ was 0.109 and...

In the reaction: Fe^3+ + SCN^− ⇌ [Fe(NCS)]2+ The initial concentration of Fe^3+ was 0.109 and the initial concentration of SCN^− was 0.105. After equilibrium was established, the concentration of the complex was 0.09. What is the equilibrium constant?

If acidic H2O2 is mixed with Fe^2+, which reaction occurs: the oxidation of Fe^2+ to Fe^3+...

If acidic H2O2 is mixed with Fe^2+, which reaction occurs: the oxidation of Fe^2+ to Fe^3+ or the reduction of Fe^2+ to Fe? Give the balanced redox reaction for each possibility and explain your reason for selecting the reaction which will occur. Assume standard solution concentrations. For a) I have: red: H2O2 + 2H+ + 2e- ---> 2 H2O E=+1.78 V oxi Fe2+ ----> Fe3+ + e- E=-0.77V Ecell = 1.01V I'm stuck on b) but for the explanation I...

2 fe + 6 hcl - 2 fecl3 + 3 h2 a. how much fe is...

2 fe + 6 hcl - 2 fecl3 + 3 h2 a. how much fe is required to generate 6 moles of h2 gas if 17.0 moles of hcl is added to enough iron that the hcl is completely used up, how many hydrogen will be produced? c. how much hcl is required to completely react with 2.8 moles of iron?

Kc is 1.67x10^20 at 25*C for the formation of iron (III) oxalate complex ion: Fe3+(aq)+3 C2O4^2->[Fe(C2O4)3]^3-....

Kc is 1.67x10^20 at 25*C for the formation of iron (III) oxalate complex ion: Fe3+(aq)+3 C2O4^2->[Fe(C2O4)3]^3-. If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion, what is the concentration of Fe3+ ion at equilibrium?

Create/draw a clear and organized FLOWCHART for K+, Fe+2 or Fe+3, Ni+2, Cr+3, NO3- and PO4-3....

Create/draw a clear and organized FLOWCHART for K+, Fe+2 or Fe+3, Ni+2, Cr+3, NO3- and PO4-3. Discuss observations for any precipitate/color changes, what you would see if it was or wasn't there, etc.

2) The ferrous ion-orthophenanthroline complex can be used to analyze for Fe(II) by using the absorption...

2) The ferrous ion-orthophenanthroline complex can be used to analyze for Fe(II) by using the absorption of this complex at 508 nm. A group of samples is known to contain between 0.1 and 0.2 g of Fe. A known sample containing 100 mg of Fe per liter was treated according to protocol, and the absorbance on a filter photometer was set to 0. The absorbance of a second standard containing 200 mg Fe per liter was then determined to be...

what is the pH of 0.120 M Fe(NO_3)_3 (Ka of Fe^3+=3.00x10^-3)? Express your answer to two...

what is the pH of 0.120 M Fe(NO_3)_3 (Ka of Fe^3+=3.00x10^-3)? Express your answer to two decimal places.

Balance following simple redox reaction Ca(s) + blank Fe+3(aq) blank + ca+2(aq) + Fe

9. Given the following reactions 2 Fe (s) + 3 CO2 (g)→ Fe2O3 (s) + 3...

9. Given the following reactions 2 Fe (s) + 3 CO2 (g)→ Fe2O3 (s) + 3 CO (g) ΔHorxn = +28.0 kJ 4 CO (g) + Fe3O4 (s)→ 3 Fe (s) + 4 CO2 (g) ΔHorxn = -12.5 kJ the enthalpy of the reaction (ΔHorxn) of Fe2O3 with CO 3 Fe2O3 (s) + CO (g)→ CO2 (g) + 2 Fe3O4 (s) is_______. 10. Given the following reactions N2 (g) + O2 (g)→ 2 NO (g) ΔHorxn = +180.7 kJ 2...

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