In the electrolysis of molten BaI 2 , which product forms at the cathode? Ba(l)
ID: 843680 • Letter: I
Question
In the electrolysis of molten BaI2, which product forms at the cathode?
Ba(l)
H2(g)
O2(g)
I2(g)
- - - - - - - - - - -
Hydrogen can be prepared by suitable electrolysis of aqueous strontium salts
False
True
- - - - - - - - - - -
What product(s) forms at the cathode in the electrolysis of an aqueous solution of KCl?
O2 and H+
K
Cl2
H2 and OH-
1.Ba(l)
2.H2(g)
3.O2(g)
4.I2(g)
- - - - - - - - - - -
Hydrogen can be prepared by suitable electrolysis of aqueous strontium salts
1.False
2.True
- - - - - - - - - - -
What product(s) forms at the cathode in the electrolysis of an aqueous solution of KCl?
1.O2 and H+
2.K
3.Cl2
4.H2 and OH-
Explanation / Answer
1)In the electrolysis of molten BaI2, which product forms at the cathode?
1.Ba(l)
In the molten form of barium iodide, barium and iodine ions are present:
BaI2(l) <-----> Ba^2+(l) + 2I^-(l)
When electricity is applied, Ba^2+ ions move to the negative electrode (cathode).
2)Hydrogen can be prepared by suitable electrolysis of aqueous strontium salts
1. False
3)What product(s) forms at the cathode in the electrolysis of an aqueous solution of KCl?
H2 and OH-
Electrolysis of an aqueous solution of potassium chloride produces chlorine gas at one electrode and potassium hydroxide at the other. The gas is either collected or allowed to escape to the atmosphere. The reaction is:
2 KCl + 2 H?O >>>> 2 KOH + Cl?' + H?'
The hydrogen gas forms at the cathode, as does the potassium hydroxide, while the chlorine gas forms at the anode.
4.H2 and OH-