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A galvanic cell has the following overall reaction. Chloride ions are added to achieve a [Cl-] = 0.15 M and precipitates most of the Pb2+. The cell voltage is 0.22 V when [H+] = 1.0 M and P(H2) = 1.0 atm. What is the Ksp for PbCl2?

Pb (s) + 2 H+ (aq) Pb2+ (aq) + H2 (g)

Eo = +0.126

a) 2.0 x 10-5

b) 4.0 x 10-5

c) 1.3 x 10-5

d) 1.3 x 10-4

e) 2.0 x 10-4

Please, explain with details whats is happening! The chemistry behind.

A galvanic cell has the following overall reaction. Chloride ions are added to achieve a [Cl-] = 0.15 M and precipitates most of the Pb2+. The cell voltage is 0.22 V when [H+] = 1.0 M and P(H2) = 1.0 atm. What is the Ksp for PbCl2?

If someone COULD HELP ME BY INDICATING SOME math ONLINE TUTORIALS. Please. Thank you.

If someone COULD HELP ME BY INDICATING SOME math ONLINE TUTORIALS. Please. Thank you.

In tray A, there were 3 pastries without olives and 5 pastries with olives. In tray B, there were 2 pastries without olives and 3 pastries with olives. Two crayons were randomly removed, one from each tray. When eating them, it was observed that only one of them contained no olive. Under these conditions, the probability that the cake without olives has been removed from tray A is

The value of Eo at 25oC for the following reaction is 0.030 V. Calculate the equilibrium constant.

Ag+ (aq) + Fe2+ (aq) Ag (s) + Fe3+ (aq)

The answer is: 3.2.

Do I have to use Nerst equation? Please, with details.

A 200.0 mL sample of 0.250 M Cu2+ is electrolyzed for 20.0 minutes with a current of 1.50 A. What is the remaining [Cu2+]?

(Atomic weight: Cu = 63.5)

Based on the cell notation for a spontaneous reaction:

Zn (s) Zn2+ (aq) // Fe3+ (aq) Fe2+ (aq) (C)

a) electrons flow in the external circuit toward the C electrode

b) Zn2+ becomes reduced

c) none of the above are correct

d) Fe2+ becomes oxidized

e) Zn is the cathode

I thought that in cell notation the anode is on the left (oxidation) and the cathode is on the right (reduction). So why is the C (s) not the cathode? Why Zn (s) is not the anode?

A 250.0 mL sample of a 0.200 M Cr3+ is electrolyzed for 45.0 minutes with a current of 1.40 A. What is the remaining [Cr3+]?

(Atomic weight: Cr = 52.00)

Thank you.

Borateem is a peroxyborate bleache. Sodium peroxyborate, NaBO3, can be prepared by electrolytic oxidation of borax (Na2B4O7) solutions. How many grams of NaBO3 can be prepared in 24.0 h if the current is 20.0 A?

Na2B4O7 (aq) + 10 NaOH (aq) = 4 NaBO3 (aq) + 5 H2O (l) + 8 Na+ (aq) + 8 e-

I am getting 12,21 g but the answer is 733g

Ammonium perchlorate, NH4ClO4, used in the solid fuel in the booster rockets on the space shuttle, is prepared from sodium perchlorate, NaClO4, which is produced commercially by the electrolysis of a hot, stirred solution of sodium chloride. How many faradays are required to produce 1.00 kg of sodium perchlorate?

How do I have ti deal when I have to deal with this kind of salt NaClO4. In more complexes salts I have doubt in make the partial redox reactions.