1. Write the balanced net reaction for a Ti (s) | TiCl2 (aq) || InCl3 (aq)...
1. Write the balanced net reaction for a Ti (s) | TiCl2 (aq) || InCl3 (aq) | In (s) chemical cell. What is the standard potential for this cell? What is the cell potential if [In3+] = 4.2 mM and [Ti2+] = 0.95 M?
2. What volume (in mL) of 0.350 M HCl should be added to 420 mL
of 0.725 M Tris base (Trishydroxymethyl aminomethane) to make a
buffer of pH 8.28?
(Hint: in this case you are generating Tris-H+ (conjugate acid) by
adding strong acid to convert a portion of the original Tris
base)
3. Describe how a voltaic cell could be used to determine the unknown concentration of a sample of iron(III) chloride. Assume all necessary materials are available.
Homework Answers
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1. Write the balanced net reaction for a Ti (s) | TiCl2 (aq) ||
InCl3 (aq)...
Write the net redox reaction that occurs in the following galvanic cell. Ti(s) | Ti- (aq)...
Write the net redox reaction that occurs in the following galvanic cell. Ti(s) | Ti- (aq) Se(s) | Se? (aq) 2 Tintaq) + 3 Sets) -- 2 Tirs) + 3 Se raq) Ti(s) • Se(s) - Tu" (aq) - Se="raq) + le 2 T1*(aq) + 3 Se(s) + 1e - 2 TH(s) + 3 Seacaq) Tu(s) Set aq) + 1e - TiB (aq) - Sets) 2 Trs) 3 Seis) -- 2 Tip- aq) + 3 Sep (aq)
What is the net ionic equation for the neutralization reaction between a HI with NH3? HI...
What is the net ionic equation for the neutralization reaction between a HI with NH3? HI (aq) + NH3 (aq) ⇌ NH4I (aq), HI (aq) + OH- (aq) ⇌ H2O (l) + I- (aq), H3O+ (aq) + OH- (aq) ⇌ 2 H2O (l) H3O+ (aq) = NH3 (aq) = NH4+ (aq) + H2O (l) Which statement about buffers is NOT true? A buffer can be made by neutralizing some of the weak base in solution by adding a strong acid,...
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine,...
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3C1? Assume that the volume of the solutions are additive and that Kb = 3.70 times 10-4 for methylamine. 10.27 10.57 10.87 11.78 Which statement about buffers is true? Buffers have a pH = 7. Buffers consist of a strong acid and its conjugate base. A buffer does not change pH on addition of a...
What is the balanced chemical equation corresponding to the following cell diagram? In(s) | In3+(aq, 1...
What is the balanced chemical equation corresponding to the following cell diagram? In(s) | In3+(aq, 1 M) || Cl-(aq, 1 M) | Cl2(g, 1 atm) | Pt(s) Group of answer choices In(s) + In3+(aq) → 2 Cl-(aq) + Cl2(g) + Pt(s) 2 Cl-(aq) + Cl2(g) → In(s) + In3+(aq) 2 In(s) + 3 Cl2(g) → 2 In3+(aq) + 6 Cl-(aq) In(s) + In3+(aq) → 2 Cl-(aq) + Cl2(g) 2 In3+(aq) + 6 Cl-(aq) → 2 In(s) + 3 Cl2(g)
1. A voltaic cell is constructed that is based on the following reaction: Sn2+(aq)+Pb(s)→Sn(s)+Pb2+(aq). A. If...
1. A voltaic cell is constructed that is based on the following reaction: Sn2+(aq)+Pb(s)→Sn(s)+Pb2+(aq). A. If the concentration of Sn2+ in the cathode compartment is 1.30 M and the cell generates an emf of 0.25 V , what is the concentration of Pb2+ in the anode compartment? B. If the anode compartment contains [SO2−4]= 1.30 M in equilibrium with PbSO4(s), what is the Ksp of PbSO4? 2. A voltaic cell utilizes the following reaction: 2Fe3+(aq)+H2(g)→2Fe2+(aq)+2H+(aq). A. What is the emf...
H aq H g anode An electrochemical cell consists of a H aq 1 .00 M H g) cat ode connected to a which e H concentration a ofa u er cons nu of a weak acid HA(0.116 M), mixed with its conjugate base, A (...
H aq H g anode An electrochemical cell consists of a H aq 1 .00 M H g) cat ode connected to a which e H concentration a ofa u er cons nu of a weak acid HA(0.116 M), mixed with its conjugate base, A (0.143 M). The measured cell voltage is E°ell 0.163 V at 25 °C, with PH2-1.00 atm at both electrodes. Calculate the pH in the buffer solution and the K of the weak acid. Ka
H...
(also specify states aq or s) 1.Write a net ionic equation* for the reaction that occurs...
(also specify states aq or s) 1.Write a net ionic equation* for the reaction that occurs when excess hydrochloric acid (aq) and iron(II) carbonate are combined. 2.Write a net ionic equation* for the reaction that occurs when excess hydrochloric acid (aq) and chromium(II) sulfide are combined. 3.Write a net ionic equation* for the reaction that occurs when aqueous solutions of sodium hydroxide and hydroiodic acid are combined 4.Write a net ionic equation* for the reaction that occurs when aqueous solutions...
Can someone please help me with this? I already asked this and nobody answered. 1. A...
Can someone please help me with this? I already asked this and
nobody answered.
1. A buffer called "Tris" is widely used in biochemistry. The (neutral) compound "Tris" itself is a weak base, so we'll notate it as "B." The pk, of its conjugate acid (HB) is 8.07. The overall goal of this problem is to calculate the pH change of a Tris buffer upon addition of some strong base. (a) Assume that you have a pH 8.40 Tris buffer...
The reaction Cu(s) + 2 AgNO_3(aq) rightarrow Cu(NO_3)_2 (aq) + 2Ag(s) is best classified as a(n)...
The reaction Cu(s) + 2 AgNO_3(aq) rightarrow Cu(NO_3)_2 (aq) + 2Ag(s) is best classified as a(n) acid-base neutralization reaction. double replacement reaction. oxidation-reduction reaction. precipitation reaction. What is the concentration of sodium ions in 0.350 M Na_3PO_4 solution? 0.117 M 0.350 M 1.05 M 1.40 M What is the molecular geometry of BrF_4^-? seesaw square planar square pyramidal tetrahedral in the reaction the spectator ions are Ag^+ and NO_3^- Ag^+ and I^- H^+ and I^- H^+ and NO_3^-
3) A voltaic cell employs the following redox reaction: Sn2+ (aq) + Mn (s) →Sn (s)...
3) A voltaic cell employs the following redox reaction: Sn2+ (aq) + Mn (s) →Sn (s) + Mn2+ (aq) a) Make a sketch of the cell. Label the cathode, anode, Sn2+, Mn, Sn, Mn?, and salt bridge. Indicate the direction of electron flow and the direction of ion flow from the salt bridge. b) Use line notation to represent the cell. c) What is the cell potential at 25°C when [Sn?] is 0.002 M and [Mn2+] is 0.050 M?
Write the net redox reaction that occurs in the following galvanic cell. Ti(s) | Ti- (aq) Se(s) | Se? (aq) 2 Tintaq) + 3 Sets) -- 2 Tirs) + 3 Se raq) Ti(s) • Se(s) - Tu" (aq) - Se="raq) + le 2 T1*(aq) + 3 Se(s) + 1e - 2 TH(s) + 3 Seacaq) Tu(s) Set aq) + 1e - TiB (aq) - Sets) 2 Trs) 3 Seis) -- 2 Tip- aq) + 3 Sep (aq)
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3C1? Assume that the volume of the solutions are additive and that Kb = 3.70 times 10-4 for methylamine. 10.27 10.57 10.87 11.78 Which statement about buffers is true? Buffers have a pH = 7. Buffers consist of a strong acid and its conjugate base. A buffer does not change pH on addition of a...
H aq H g anode An electrochemical cell consists of a H aq 1 .00 M H g) cat ode connected to a which e H concentration a ofa u er cons nu of a weak acid HA(0.116 M), mixed with its conjugate base, A (0.143 M). The measured cell voltage is E°ell 0.163 V at 25 °C, with PH2-1.00 atm at both electrodes. Calculate the pH in the buffer solution and the K of the weak acid. Ka
H...
Can someone please help me with this? I already asked this and
nobody answered.
1. A buffer called "Tris" is widely used in biochemistry. The (neutral) compound "Tris" itself is a weak base, so we'll notate it as "B." The pk, of its conjugate acid (HB) is 8.07. The overall goal of this problem is to calculate the pH change of a Tris buffer upon addition of some strong base. (a) Assume that you have a pH 8.40 Tris buffer...
The reaction Cu(s) + 2 AgNO_3(aq) rightarrow Cu(NO_3)_2 (aq) + 2Ag(s) is best classified as a(n) acid-base neutralization reaction. double replacement reaction. oxidation-reduction reaction. precipitation reaction. What is the concentration of sodium ions in 0.350 M Na_3PO_4 solution? 0.117 M 0.350 M 1.05 M 1.40 M What is the molecular geometry of BrF_4^-? seesaw square planar square pyramidal tetrahedral in the reaction the spectator ions are Ag^+ and NO_3^- Ag^+ and I^- H^+ and I^- H^+ and NO_3^-
3) A voltaic cell employs the following redox reaction: Sn2+ (aq) + Mn (s) →Sn (s) + Mn2+ (aq) a) Make a sketch of the cell. Label the cathode, anode, Sn2+, Mn, Sn, Mn?, and salt bridge. Indicate the direction of electron flow and the direction of ion flow from the salt bridge. b) Use line notation to represent the cell. c) What is the cell potential at 25°C when [Sn?] is 0.002 M and [Mn2+] is 0.050 M?
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