the Half reaction : 2H2O(l) ->4H+(aq) + O2(g) +4e-
Examine the half-reaction you have just written. How would you test for the presence of the other, non-gaseous product being formed?
If H+ is being considered as the other non-gaseous product, then it can be tested by measuring pH of the solution using a pH meter or a litmus paper. Production of H+ will decrease the pH and will turn blue litmus red.
the Half reaction : 2H2O(l) ->4H+(aq) + O2(g) +4e- Examine the half-reaction you have just written....
Previous Tries were:
1st Try:
2H2O --> O2 + 4H+ + 4e-
Ag --> Ag+ + e-
2F- --> F2 + 2e-
F2 + 2e- --> 2F-
Second Try:
O2 + 4H+ + 4e- --> 2H2O
Ag --> Ag+ + e-
2H2O --> O2 + 4H+ + 4e-
F2 + 2e- --> 2F-
Reactions at Electrodes during Electrolysis Answer the following questions by selecting the appropriate half-reaction. Assume that in each case the experiment...
Given the following standard half-cell potentials: MnO2(s) + 4H+ (aq) + 2e– → Mn2+(aq) + 2H2O(l) E° = 1.23 V NO3 – (aq) + 4H+ (aq) + 3e– → NO(g) + 2H2O(l) E° = 0.96 V N2(g) + 5H+ (aq) + 4e– → N2H5 + (aq) E° = –0.23 V Which of the following reactions is nonspontaneous under standard state conditions?
Hydrogen peroxide decomposes spontaneously to yield water and oxygen gas according to the reaction equation 2H2O2(aq)⟶2H2O(l)+O2(g)2H2O2(aq)⟶2H2O(l)+O2(g) The activation energy for this reaction is 75 kJ⋅mol−1.75 kJ⋅mol−1. In the presence of a metal catalyst, the activation energy is lowered to 49 kJ⋅mol−1.49 kJ⋅mol−1. At what temperature would the non‑catalyzed reaction need to be run to have a rate equal to that of the metal‑catalyzed reaction at 25 ∘C? T= K
Write balanced half-reactions for the following redox reaction:? 2CO2(aq)+2NO2(g)+2H2O(l)=====>C2O42-(aq)+2NO3(aq)+4H+(aq)
Consider the reduction half-reaction at 25 C: Br2 (l) + 2e- --> 2 Br- (aq) Is a spontaneous redox reaction obtained by pairing with the half-reactions below? a) 2F- (aq) --> F2(l) + 2e- b) 2H2O (l) --> O2(g) + 4H+(aq) + 4e-
A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential O2 (g) + 4H+ (aq) +4e− → 2H2O (l) =E0red+1.23V Zn+2 (aq) +2e− → Zn (s) =E0red−0.763V Answer the following questions about this cell. Write a balanced equation for the half-reaction that happens at the cathode. Write a balanced equation for the half-reaction that happens at the anode. Write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is...
the following first order reaction has a half life of 22.5
minutes.
2H2O2(aq)
2H2O(l) + O2(g)
a. calculate the rate constant for this reaction.
b. if the initial concentraition of H2O2 is 0.30M, calculate the
amout of H2O2 that reamains after 45 min.
At 69.0 ∘C , what is the maximum value of the reaction quotient, Q, needed to produce a non-negative E value for the reaction SO42−(aq)+4H+(aq)+2Br−(aq)⇌Br2(aq)+SO2(g)+2H2O(l) In other words, what is Q when E=0 at this temperature? Express your answer numerically to two significant figures.
Standard Electrode Potentials at 25?C Reduction Half-Reaction E?(V) F2(g)+2e? ?2F?(aq) 2.87 Au3+(aq)+3e? ?Au(s) 1.50 Cl2(g)+2e? ?2Cl?(aq) 1.36 O2(g)+4H+(aq)+4e? ?2H2O(l) 1.23 Br2(l)+2e? ?2Br?(aq) 1.09 NO3?(aq)+4H+(aq)+3e? ?NO(g)+2H2O(l) 0.96 Ag+(aq)+e? ?Ag(s) 0.80 I2(s)+2e? ?2I?(aq) 0.54 Cu2+(aq)+2e? ?Cu(s) 0.16 2H+(aq)+2e? ?H2(g) 0 Cr3+(aq)+3e? ?Cr(s) -0.73 2H2O(l)+2e? ?H2(g)+2OH?(aq) -0.83 Mn2+(aq)+2e? ?Mn(s) -1.18 How can the table be used to predict whether or not a metal will dissolve in HCl? In HNO3? Drag the terms on the left to the appropriate blanks on the right to...
Eqation: 2I^-(aq) + 2NO2^-(aq) + 4H^+(aq) ---> I2(aq) + 2NO(aq)
+ 2H2O(l)
1. MI*V1 - M2*V2 V2 - 10ml VI = 2ml 4.5. 2 - M2 * 10 M2 - 0.9mM 2. Ksp - [Pb 2+][-]^2 Ksp - 1.401008 1.4*10^-8 - [Pb 2+1 (1.1 10.47 2 [Pb 2+] - 1.16M 3. Examine Eq. 3, above. Is this a redox reaction? If so, which element is being oxidized? Which element is being reduced? Explain your answer(s) by using the appropriate oxidation...