Rubidium sulfate is a sulfate of rubidium with the chemical formula Rb2SO4.
Reactions Rubidium sulfate reacts with yttrium(III) sulfate forming a double salt: Y2(SO4)3 + Rb2SO4 → Rb3[Y(SO4)3] Rubidium sulfate reacts with sulfuric acid forming rubidium hydrogen sulfate, the acid sulfate: Rb2SO4 + H2SO4 → 2 RbHSO4
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