An aqueous solution of rubidium sulfate contains 0.37 M rubidium ions. If the solution contains no substances other than rubidium sulfate and water, what is the concentration of sulfate ions in the solution?
The chemical formula of Rubidium sulfate is Rb2SO4.
This means 1 mole of this compound produces 2 moles of rubidium ions in the solution and 1 mole of sulfate ions.
Conc. of sulfate ions = 0.5*[Rb2+] = 0.5*0.37 = 0.185 M