Cr(VI) should have no unpaired electrons and have no color, but when bound to oxygen, charge transfer occurs from the O 2-. CrO4 (chromate) has four oxygens which all charge transfer to the Chromium giving orange color. In Cr2O7 (dichromate) one oxygen bridges between the two Chromium atoms so each only gets charge transfer from three oxygens. Cr(VI) should have no unpaired electrons and have no color, but when bound to oxygen, charge transfer occurs from the O 2-. CrO4 (chromate) has four oxygens which all charge transfer to the Chromium giving orange color. In Cr2O7 (dichromate) one oxygen bridges between the two Chromium atoms so each only gets charge transfer from three oxygens.
KCrO4 does not exist it is K2CrO4 and is called Potassium Chromate. Potassium dichromate is K2Cr2O7
Potassium chromate K2Cr(VI)O4 Indicates the oxidation state of the chromium component.
Potassium chromate is K2CrO4 Potassium dichromate is K2Cr2O7
The name of SnCrO4 is Tin II Chromate or stannous chromate.
Lead (II) Dichromate
by the reaction of lead nitrate with potassium chromate or potassium dichromate
KCrO4 does not exist it is K2CrO4 and is called Potassium Chromate. Potassium dichromate is K2Cr2O7
Potassium chromate K2Cr(VI)O4 Indicates the oxidation state of the chromium component.
Potassium chromate is K2CrO4 Potassium dichromate is K2Cr2O7
I think Potassium chromate is not used in medicines. However, Potassium dichromate is used in making a homeopathic medicine called Kali Bichromicum
This is a mixture of 2K+ and Cr2O72- ions in strong sulfuric acid.2CrO4- + 2H+ ----> Cr2O72- + H2Ochromate-yellow -> dichromate-orangeNote:Potassium ions do NOT react, they are tribune-ions
The name of SnCrO4 is Tin II Chromate or stannous chromate.
In an acidic solution chromate ions are converted into dichromate ions.
Lead (II) Dichromate
Reaction of Potassium hydroxide or any potassium salt of a weak acid with chromic acid produces Potassium chromate. KOH + H2CrO4 ----> K2CrO4 + H2O K+ + H2CrO4 ----> K2CrO4 + H+
It is Ferrous chromate or Iron (II) chromate .
Equivalent weight of potassium dichromate = Molecular mass/6 = 294,185/6 = 49,0308