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Author Question: Which is not a characteristic reaction of chromium metal or chromium(II) ion? (Read 31 times)

tth

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Question 1

What chemical equation represents the best method for obtaining pure chromium?
◦ FeCr2O4(s) + 4 C(s) + heat → Fe(s) + 2 Cr(s) + 4 CO(g)
◦ Cr2O3(s) + 2 Al(s) + heat → 2 Cr(s) + Al2O3(s)
◦ Cr2+(aq) + H2(g) → Cr(s) + 2 H+(aq)
◦ Cr2O3(s) + 2 Fe(s) + heat → Fe2O3(s) + 2 Cr(s)

Question 2

Which is not a characteristic reaction of chromium metal or chromium(II) ion?
◦ 4 Cr2+(aq) + O2(g) + 4 H+(aq) → 4 Cr3+(aq) + 2 H2O(l)
◦ Cr(OH)2(s) + OH-(aq) → Cr(OH)3-(aq)
◦ Cr(OH)2(s) + 2 H3O+(aq) → Cr2+(aq) + 4 H2O(l)
◦ Cr(s) + 2 H+(aq) → Cr2+(aq) + H2(g)


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Marked as best answer by tth on Feb 15, 2020

jaaaaaaa

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tth

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Reply 2 on: Feb 15, 2020
Gracias!


abro1885

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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