Use a Ka for HCOOH of 1.8 x 10^-4 Given that Ka for HF is 6.3 x 10-4 at 25^o �C, what is the value of Kb for F- at 25^o �C? Given that Kb for CH_3NH_2 is 5.0 � 10-4 at 25^o �C, what is the value of Ka for CH3NH3 at 25^o...
Given that Kb for (CH3)2NH is 5.4 * 10-4 at 25degree C, what is the value of Ka for (CH3)2NH2 A solution of formic acid 0.20 M has a pH of 5.0. What is its Ka value? a) 5.0 x 10-10 b) 1.0 x 10-5 c) 5.0 x 10-5 d) 25 The netcharge of histidine at pH=pKa2 ...
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【解析】分析:氨水逐滴滴入盐酸和醋酸的混合液中,依次发生的反应为:HCl+NH3·H2O=NH4Cl、CH3COOH+NH3·H2O=CH3COONH4+H2O;盐酸为强酸,随着氨水的滴入,溶液的体积变大,溶液中离子浓度变小,溶液的电导率逐渐变小,当盐酸恰好完全反应时电导率最小,b点为等浓度的NH4Cl和CH3COOH的混合液;继续滴加氨水,弱酸醋酸与氨...
Write an equilibrium expression for the reaction of CH3CO2Na with H3O+. Indicate the acid and conjugate base species. For each of the following acids in water, write the dissociation reaction and the corresponding Ka equilibrium expression. a. HCN b. HOC6H5 c. C6H5NH3^+ Write the chemica...
The value of Ka for acetylsalicylic acid (aspirin) is 3.00×10−4. What is the value of Kb for its conjugate base, C9H7O4−? Dissociation Constant: The acid dissociation comes into the picture when a solution contains a weak acid, and it...
The value of {eq}K_a {/eq} for hypochlorous acid is {eq}3.50 \times 10^{-8} {/eq}. What is the value of {eq}K_b {/eq} for its conjugate base, {eq}ClO^- {/eq}? Weak Acid-Base Conjugate Pair: The partial dissociation of a weak Bron...
What is the value of Ka for hydrocyanic acid? Given that Ka for HF is 6.3 x 10-4 at 25^o �C, what is the value of Kb for F- at 25^o �C? Given that Kb for CH_3NH_2 is 5.0 � 10-4 at 25^o �C, what is the value of Ka for ...
The equilibrium constant for acid dissociation of acetic acid, Ka, is 1.8 x 10-5. Explain what this tells us about the favored direction of the equilibrium (i.e. does it favor reactants or products)? Is it true that the value of K (equilibrium constant) depends o...
(The value of Ka for HCHO2 is 1.8�x10-4.) Calculate the pH of a 0.088 M CH3CH2COOH solution. (Ka = 1.3 x 10-5) Calculate the pH of a 0.50 M NaOCN solution. The Ka for cyanic acid is 3.5 x 10-4. Calculate the pH of a 0.885 M HF solution. (K...