Chromium
Name:
Chromium ['krəʊmiəm]
Cr Molar Mass Conversion in Batch
Elem.
Total
Name
Atomic Mass
(g/mol)
Percentage
Mass
Cr
1
Chromium
51.9961
100%
52
→ Cr
Total: 51.9961 (g/mol)
Chromium element has 24 protons, 28 neutrons and 24 electrons.
Chromium is a solid metal at room temperature, melting point 1907 ̊C.
» Common Chromium compounds:
• Chromium(III) Nitrite, Cr(NO2)3
• Dichromic Acid, H2Cr2O7
• Chromous Acid, H2CrO3
• Chromic Acid, H2CrO4
• Hypochromous Acid, H2CrO2
• Potassium Chromate, K2CrO4
• Nickel(II) Chromite, NiCrO3
• Lead(II) Dichromate, PbCr2O7
• Chromium(III) Hydroxide, Cr(OH)3
Example Reactions:
• 2HCl + Cr = CrCl2 + H2
• 3Hg + CrCl3 = 3HgCl + Cr
• Fe(NO3)3 + Cr = Fe + Cr(NO3)3
• Cr(NO3)3 + Al = Al(NO3)3 + Cr
• Zn + CrCl2 = Cr + ZnCl2
• Mg + CrSO4 = MgSO4 + Cr
• Cr + NiSO4 = CrSO4 + Ni
• Zn + CrSO4 = ZnSO4 + Cr
• 2NiF3 + Cr = CrF6 + 2Ni
• Cr + 3H2SO4 = Cr(SO4)3 + 3H2
