The first dissociation step is the most significant, with Ka1 being several orders of magnitude larger than Ka2 and Ka3. This means that phosphoric acid primarily dissociates into hydrogen ions (H+) and dihydrogen phosphate ions (H2PO4-). The second dissociation step is much weaker, resulting...
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Determine the Ka of an acid whose 0.320 M solution has a pH of 3.84. Determine the K_a of an acid whose 0.294 M solution has a pH of 2.80. Determine the Ka of an acid whose 0.180 M solution has a pH of 4.35. Determine the Ka of ...
A buffer solution is prepared by dissolving 0.200 moles of NaH2PO4 and 0.100 moles of NaOH in enough water to make 1.00 L of solution. What is the pH of the H2PO4- / HPO42- buffer if Ka2 = 6.2 x 10^-8? What is the Ka of an ...
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已知:H3PO4的Ka1y=7.1×10-3,Ka2y=6.3×10-8,Ka3y=4.2×10-13;H2CO3的Ka1y=4.4×10-4,Ka2y=4.7×10-11。下列溶液的浓度均为0.1 mol·L-1,其中pH值最小的是A.NaHCO3B.NaH2PO4C.Na3PO4D.Na2HPO4的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大
Code specifying the units in which a value is being expressed, or manner in which a measurement has been taken
Code specifying the units in which a value is being expressed, or manner in which a measurement has been taken
H2PO4- + H2O arrow H3O+ + HPO42-If the K_a of the conjugate acid is 6.99 times 10^{-7}, what is the pK_b for the base?The Bronsted-Lowry acid in the chemical equation below is ___. HNO_2 (aq) + H_2O (l) to H_3O^+(aq) + N...
Calculate the equilibrium constant K for the dissociation of phosphoric acid (H3PO4) into H+ and H2PO-4 ions at 25^o C. The enthalpy of formation (delta Hf) and entropy (delta S) for each species are below-mentioned. Additionally, which thermodynamic fac ...