Benzoic acid, C6H5COOH (pKa 4.19), is only slightly soluble in water, but its sodium salt, C6H5COO-Na+, is quite soluble in water. In which solution(s) will benzoic acid dissolve? Q. Aqueous NaOH
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Benzoic acid, C6H5COOH (pKa 4.19), is only slightly soluble in water, but its sodium salt, C6H5COO-Na+, is quite soluble in water. In which solution(s) will benzoic acid dissolve?
Q. Aqueous NaOH
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- Acetic acid, CH3COOH, is a weak organic acid, pKa 4.76. Write an equation for the equilibrium reaction of acetic acid with each base. Which equilibria lie considerably toward the left? Which lie considerably toward the right? Q.) NaOHWhat is the pH of an aqueous solution containing 0.50 mol L–1 ethanoic acid, 0.30 mol L–1 sodium ethanoate, and 0.10 mol L–1 HCl? [The pKa of ethanoic acid is 4.75.]The amount of tartaric acid is responsible for the tartness of wine and controls the acidity of the wine. Tartaric acid also plays a very significant role in the overall taste, feel and color of a wine. Tartaric acid is a diprotic organic acid The chemical formula for tartaric acid is C4H6O6 and its structural formula is HO2CCH(OH)CH(OH)CO2H. A 50.00 mL sample of a white dinner wine required 21.48 mL of 0.03776 M NaOH to achieve a faint pink color. Express the acidity of the wine in terms of grams of tartaric acid, H2C4H4O6 (M. M. = 150.10) per 100 mL of wine. Assume that the two acidic hydrogens are titrated at the end point. MM H2C4H4O6 = 150.10 MM NaOH = 40.00 Below is the balanced chemical equation for this titration.
- Is butanedioic acid soluble in water? HCl? NaOH? NaHCO3?Which of the following can dissolve in water? (Give all answers) O butane O 1-butanol CH3CH3 HOCH2CH2CH,CH2OH none of the compounds can dissolve in water6. A nucleotide is the basic building block of nucleic acids. RNA and DNA are polymers made of long chains of nucleotides. A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base (the red nitrogen atom is connected to a sugar molecules). NH₂ adenine (A) HN. NH₂ NH (a) paired bases by hydrogen bonding. NH₂ HN HN cytosine (C) guanine (G) thymine (T) uracil (U) Which bases will make hydrogen-bonds together within an DNA? Draw structures of the (b) Which bases will make hydrogen-bonds together within an RNA? Draw structures of the paired bases by hydrogen bonding.
- 7. What is [H3O"] (a) when 0.200 mmol benzoic acid is diluted in 0.100 L of water? (b) when 0.200 mmol benzoic acid is diluted in 0.100 L of a solution of 0.10 M CaCl2?Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 4.14 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i I M What was the pH of the ascorbic acid solution before it was evaporated? pH = i What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i MWhich of the following compounds is least soluble in water? 1S CH;CH,CH,NH, CH;CH,CH,F ) CH;CH(OH)CH3 O CH;CH,COOH CH;CH,NHCH3
- Consider the following reactions. 2CH4 (g) ⇌ C2H6 (g) + H2 (g) Kc = 9.5x10–13 CH4 (g) + H2O (g) ⇌ CH3OH (g) + H2 (g) Kc = 2.8x10–21 Calculate the equilibrium constant, Kc value for the following reaction. 2CH3OH (g) + H2 (g) ⇌ C2H6(g) + 2H2O (g)Cream of tartar is a white powder sometimes used in baking. (It's what separates a tangy, chewy snickerdoodle from an ordinary cinnamon-coated sugar cookie. The acid in the cream of tartar gives snickerdoodles their distinctive tangy flavor, and the chew happens because cream of tartar prevents sugar in the cookie dough from crystalizing into crunchiness. Allrecipies.com) Cream of tartar (KHC4H4O6) is the conjugate base salt of tartaric acid (shown to the right). The Ka for another similar acid is 8.7×10-3. What is the standard Gibb's free energy (in kJ/mol) for the dissociation of that other acid?Write the products of the reaction of diphenhydramine (a base) with the acid HCl shown below. Are the reactants or products more soluble in water? Briefly explain.