saraaaalynn6536 saraaaalynn6536 23-05-2024 Chemistry Answered A student needs to prepare a buffer made from HCN and KCN with pH 9.115 . If Kₐ for HCN is 4.00 × 10⁻¹⁰, what ratio of [HCN]/[CN⁻] is required?[HCN]/[CN] = _______