Electrochemistry

PR? PRACTICE ELECTROLYSIS



Under the proposals, indicating whether they are true (V) or false (F).

Electrolysis is the transformation of electrical energy into química.Mediante electrolysis, chemical substances can be decomposed into more simples.En used electrolysis current.



A) FFF B) FVF C) ELV D) VVF E) VVV



Regarding the elements of the electrolysis, indicating the propositions that are true:

Electrolytes are ionic or polar covalent substances melted or dissolved in agua.Los inertes.La electrodes are always current flows from cathode to anode.



A) I only B) II only C) I and III D) I, II and III E) II and III



Mark the incorrect statement, regarding the electrolysis of water.

A) The diluted acidic water decomposes into hydrogen and oxygen gases.

B) At the cathode hydrogen gas is collected.

C) At the anode oxygen gas is collected.

D) The volume of gaseous oxygen is twice the volume of hydrogen gas.

E) corresponds to a redox reaction.



Electrolysis is a process where:

Redox reactions develop espontáneas.La no current is directed from the anode to cátodo.Algunos electrodes are active and consume the duration of the phenomenon.



A) I only B) II only C) III only D) I and II E) I, II and III



What mass in grams of oxygen is liberated at the anode when used 5 faraday of charge?



A) 24 B) 16 C) 30 D) 36 E) 40



What volume, in normal conditions, hydrogen is released at the cathode when using a load of 10 faraday?



A) 11.2 L B) 112 C) 56 D) 224 E) 22.4



Through an electrolyte solution containing (Cu +2) 5 moles of electrons passed. What mass of copper is deposited on the cathode? (M.A. Cu = 64)



A) 160 g B) 80 C) 64 D) 320 E) 240



Point propositions are correct.

1 C = 96 500 F1 Eq-q = 1 F = 6.022 Eq-g/96 5001 x 1023 e-



A) I only B) II only C) III only D) II and III E) I, II and III



When electrolyzed acidic water in the cathode is collected:



A) Sulfur B) hydrogen C) oxygen

D) hydroxyl ions E) hydronium ions



When electrolyzed molten sodium chloride in the anode is collected:



A) oxygen B) sodium C) hydrogen

D) E chlorine) sodium hydroxide



How much time is required to deposit 650 g of zinc electrolysis when used ZnCl2 9.65 A?. m.A. (Zn) = 65.



A) 4.17 s B) 2106 C) 2105 D) 8.25 E) 2107



193 000 C were passed through a solution of aluminum nitrate. What is the mass of aluminum deposited on the cathode?. m.A. (Al) = 27.





A) 12 g B) 13 C) 18 D) 15 E) 16



If the cathode of an electrolytic cell containing AgNO3 were deposited 5.4 g of the metal during 965 seconds. What electric current is used? m.A. (Ag) = 108.



A) 3.5 A B) 4.5 C) 4 D) 2.5 E) 5



What is the current intensity in 96.5 seconds deposited 1.2 g of magnesium? m.A. (Mg) = 24.



A) 0.011 A B) 21.20 C) 50 D) 84.65 E) 100



Given the propositions with respect to electrolysis, indicate whether they are true (V) or false (F).



At the cathode the anode produces reducción.En oxidación.Los develops only aqueous electrolytes.



A) FFF B) FVF C) ELV D) VVF E) FVV



How many grams of iron are deposited electrolytically from a solution containing Fe +3 in an hour for the passage of 10 amps? m.A. (Fe) = 56.



A) 2.34 B) 1.34 C) 0.16 D) 0.78 E) 6.96