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Laiticia
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Hi guys
Could you help me?

Can someone help me with these 2 questions? First one is How do the results for elecrolysing compounds in soloution deffer from the results for electrolysing molten compounds?
Second is Which4 elements are present in the solution of sodium sulphate in water? Where does the hydrogen come from when it is formed at the cathode during the electrolysis of sodiun sulphate solution? Need help badly guys just these two questions need answering
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Tish
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GH
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Report 16 years ago
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(Original post by Laiticia)
Hi guys
Could you help me?

Can someone help me with these 2 questions? First one is How do the results for elecrolysing compounds in soloution deffer from the results for electrolysing molten compounds?
Second is Which4 elements are present in the solution of sodium sulphate in water? Where does the hydrogen come from when it is formed at the cathode during the electrolysis of sodiun sulphate solution? Need help badly guys just these two questions need answering
Love
Tish
Solution-something to do with aqueous-therefore water involved-maybe hydrogen/oxygen evolved from the water.
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hornblower
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(Original post by Laiticia)
First one is How do the results for elecrolysing compounds in soloution deffer from the results for electrolysing molten compounds?
In a molten solution the cation (e.g. sodium) is evolved at the cathode. In an aqueous solution it is hydrogen.

(Original post by Laiticia)
Second is Which4 elements are present in the solution of sodium sulphate in water?
Sodium, sulphur, oxygen and hydrogen.

(Original post by Laiticia)
Where does the hydrogen come from when it is formed at the cathode during the electrolysis of sodiun sulphate solution?
The H+ ions from the water, since the water ionises to form OH- ions and H+ ions.

J.
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