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Author Question: Which is not a characteristic reaction of chromium metal or chromium(II) ion? (Read 67 times)

tth

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on: Feb 15, 2020

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)
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by tth on Feb 15, 2020

jaaaaaaa

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Reply #1 on: Feb 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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tth

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Reply 2 on: Feb 15, 2020
Excellent

olderstudent

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

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