In the electrolysis of a solution, which two ions are present from the water molecules themselves?
H+ ions and OH- ions.
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In the electrolysis of aqueous solutions, what is the rule for determining which ion will be oxidised (lose electrons) at the anode (positive electrode)?
It will always be the OH-, unless there is a halide ion (such as Cl-, or Br-) present.
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In the electrolysis of aqueous solutions, what is the rule for determining which ion will be reduced (gain electrons) at the cathode (negative electrode)?
It will always be the H+ ion, unless Cu2+ is present (another way of phrasing it would be that it is always the ion of the least reactive element).
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In the electrolysis of aqueous sodium chloride, KBr (aq), which 4 ions would be present in the electrolyte?
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In the electrolysis of aqueous sodium chloride, KBr (aq), which of the ions will be oxidised (lose electrons) at the anode (positive electrode)?
Bromide ions (Br-)
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In the electrolysis of aqueous sodium chloride, NaCl (aq), which ions will be reduced at the cathode (negative electrode)?
Hydrogen ions (H+)
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Why is aqueous electrolysis generally cheaper than molten electrolysis?
In aqueous electrolysis the substance is just dissolved in water, no energy is required to melt it.
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