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In order to answer these questions you must remember that a conjugate acid gains a proton (H+) and a conjugate base looses a proton. Question: What is the base in this equation: PO₄³⁻ base + HNO₃ acid --> NO₃⁻ conjugate base + HPO₄²⁻ conjugate acid In this equation, PO₄³⁻gains a hydrogen and forms HPO₄²⁻ this means that PO₄³⁻ is the base and HPO₄²⁻ is the conjugate acid. In addition to this, HNO₃ looses a hydrogen and forms NO₃⁻. This means that HNO₃ is the acid and NO₃⁻ is the conjugate base. |