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Adipic acid,
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Generl Chem Looself&mod Mst/et&stdy Crd Pkg, 11/e
- 1. What is [H3O+] in a 0.10 M solution of HCN at 25°C? (K, for HCN = 4.0 × 10−10) 1.6 × 10−9 M 6.3 × 10−6 M 2.0 × 10−5 M 4.0 × 10−11 Marrow_forward8-55 We commonly refer to a buffer as consisting of approximately equal molar amounts of a weak acid and its conjugate base—for example, CH3COOH and CH3COO-. Is it also possible to have a buffer consisting of approximately equal molar amounts of a weak base and its conjugate acid? Explain.arrow_forwardWhat is the freezing point of 0.92 M aqueous acetic acid? The density of this solution is 1.008 g/cm3.arrow_forward
- Acrylic acid is used in the polymer industry in the production of acrylates. Its K, is 5.6 X 10“’. What is the pH of a 0.11 M solution of acrylic acid, CH2CHCOOH?arrow_forwardThe simplest amino acid is glycine, H2NCH2CO2H. The common feature of amino acids is that they contain the functional groups: an amine group, -NH2, and a carboxylic acid group, -CO2H. An amino acid can function as either an acid or a base. For glycine, the acid strength of the carboxyl group is about the same as that of acetic acid. CH3CO2H, and the base strength of the amino group is slightly greater than that of ammonia, NH3. (a) Write the Lewis structures of the ions that form when glycine is dissolved in 1 M HCl and in 1 M KOH. (b) Write the Lewis structure of glycine when this amino acid is dissolved in water. (Hint: Consider the relative base strengths of the -NH2 and -CO2- groups.)arrow_forwardThe simplest amino acid is glycine, H2NCH2CO2H. The common feature of amino acids is that they contain the functional groups: an amine group, –NH2, and a carboxylic acid group, –CO2H. An amino acid can function aseither an acid or a base. For glycine, the acid strength of the carboxyl group is about the same as that of acetic acid, CH3CO2H, and the base strength of the amino group is slightly greater than that of ammonia, NH3.(a) Write the Lewis structures of the ions that form when glycine is dissolved in 1 M HCl and in 1 M KOH.(b) Write the Lewis structure of glycine when this amino acid is dissolved in water.arrow_forward
- A solution of vinegar is 0.763 M in acetic acid, C2H4O2(molar mass = 60 g mol-1). The density of vinegar is 1.004 g/mL. What is the molal concentration of acetic acid? Phenols, HOC6H5 are weakly acidic, and in aqueous solution an equilibrium exists between the phenol and the phenoxide ion. Ka for HOC6H5 = 1.6 ×10-10. What is the optimal pH for phenol buffers? Consider 1.0 L of a solution that is 0.85 M HOC6H5 and 0.80 M NaOC6H5. Calculate the pH of this solution. Calculate the pH after 0.10 mole of HCl has been added to the part (b) solution. Assume no volume change on addition of HCl. (a) The Ka of benzoic acid (C6H5CO2H,molar mass = 122 g·mol-1) is 6.46×10-5. A solution is prepared by dissolving 6.1 g benzoic acid in enough water to make 1.0 L of solution. Calculate [C6H5CO2H], [C6H5CO2–], [H+], [OH–], the pH and the percent ionization of this solution. Sodium benzoate (NaC7H5O2) is used as a food preservative. What is the ratio of the concentration of…arrow_forwardA solution of volume 0.500 L contains 1.68 g NH3 (Kb = 1.8 x 10^-5) and 4.05 g (NH4)2SO4. What is the pH of this solution?arrow_forwardA 0.025 M solution of an unknown organic acid has a pH of 3.23. 2.1 By means of a full calculation, determine the value of the ionisation constant of the conjugatebase of this acid..- You may use “HA” to denote the formula of the acid.- You may make certain assumptions to simplify your calculations2.2 A certain amount of the sodium salt of the conjugate base of the acid was added to the system.Will the pH of the resulting solution increase or decrease, compared to the original given value? Explain your answer in a short sentence or two.arrow_forward
- 2. The ionization constant for acetic acid is 1.8 x 10-5. How many grams of NaC2H3O2 must be added to one liter of a 0.20 M solution of HC2H3O2 to maintain a hydrogen ion concentration of 6.5 x 10-5 M?arrow_forwardIn which on e of the following solutions is silver chloride the most soluble? A) 0.0150 M NH3 B) 0.200 M HCl C) pure water D) 0.750 M LiNO3 E) 0.185 M KClarrow_forwardWhat mass of NaNO3 can be dissolved in 100 mL H2O at 10oC?arrow_forward
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