What is the positive ion in sodium sulphate?
Sulphide ion
Sodium ion
Sulphate ion
Sulphite ion
write the net ionic equation for the reaction of potassium dichromate with sodium sulphite in acid solution to give chromium ion and sulphate ion.
balance in acidic medium
k2cr2o7 + na2so3 = cr3+ + so4(2-)
potassium dichromate + sodium sulphite = chromium + sulphate ion