4 because its a cool number
so it can be balanced out
two potassium ions balance one sulfide ion. Potassium is K+, Sulfide is -2, so 2xK+ + 1x-2 = 0
Two. the sulfide ion is S2- so two K+ ions are required to balance the charges
Exactly 2
The chemical formula of potassium dichromate is K2Cr2O7
so it can be balanced out
two potassium ions balance one sulfide ion. Potassium is K+, Sulfide is -2, so 2xK+ + 1x-2 = 0
Two. the sulfide ion is S2- so two K+ ions are required to balance the charges
Normally, 2 K+ ions are required for making a stable ionic bond with one S 2- anion. The compound formed would be Potassium Sulfide (K2S).
so it can be balanced out
Exactly 2
The chemical formula of potassium dichromate is K2Cr2O7
Bisulphite is HSO3, otherwise known as hydrogen sulfite. This has a -1 charge, therefore there is 1 K+ needed to balance this. The chemical formula is thus, KHSO3.
Sodium chloride is neutral.
A barium ion has a charge of 2+ and an iodide ion has a charge of 1-, therefore, two iodide ions are needed to balance the barium ion. Ba2+ + 2I- --> BaI2
three sodium ions
2