The charge is minus 2.
-2
The formula for a chromate ion is CrO4-2, and its charge is -2.
Valency = 2 -
The chromate ion (CrO4-2) has yellow colour so all the chromate compounds including silver chromate is yellow in colour.
Silver Chromate Ag=Silver CrO4= Chromate(a polyatomic ion)
The hydroxide ion has a 1- charge.
The formula for a chromate ion is CrO4-2, and its charge is -2.
The chromate ion has a charge of 2-. Its symbol is CrO42-.
The formula, including the charge, for a chromate ion is CrO4-1.
Sn(CrO4)2 Tin 4 means that the tin is a cation with a +4 charge. Chromate is a polyatomic ion with the formula (CrO4)-2. Since the tin ion has a +4 charge in this case, and the chromate ion has a -2 charge, there is a 1:2 ratio of tin ions to chromate ions.
The chromate ion is CrO42-
The formula for Copper (II) Chromate is CuCrO4.The copper has a 2+ charge (Cu2+) and the chromate ion has a 2- charge ( (CrO4)2-).Since the charges balance each other out, therefore, we get CuCrO4.
Yellow
Valency = 2 -
CrO4-2
CrO4-2
Conversion is increased when the pH increase.
The conversion increase when the pH increase.