6. At 25.0°C, 65.0 mL of 0.784 M ascorbic acid, HC6H7O6 was mixed with 45.0 mL of 0.371 M KOH. Ka = 8.1 x 10-5 a. Determine the moles of ascorbic acid b. Determine the moles of KOH C. Write out the equilibrium equation that forms and complete the ICE box. d. Determine the pH.

6. At 25.0°C, 65.0 mL of 0.784 M ascorbic acid, HC6H7O6 was mixed with 45.0 mL of 0.371 M KOH. Ka = 8.1 x 10-5 a. Determine the moles of ascorbic acid b. Determine the moles of KOH C. Write out the equilibrium equation that forms and complete the ICE box. d. Determine the pH.

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter10: Acids, Bases, And Salts

Section: Chapter Questions

Problem 10.113EP

See similar textbooks

Similar questions

Does the pH of the solution increase, decrease, or stay the same when you (a) Add solid sodium oxalate, Na2C2O4, to 50.0 mL of 0.015-M oxalic acid? (b) Add solid ammonium chloride to 100. mL of 0.016-M HCl? (c) Add 20.0 g NaCl to 1.0 L of 0.012-M sodium acetate, NaCH3COO?
I. Consider a 1.00 L of 1.50x10 -3 M hydrocyanic acid (HCN,K=4.9×1019) 1. Write the equilibrium expression. 2. Calculate the pH of the solution. 3. If a 9.00x10 mol sodium cyanide, NaCN, is added, what is the pH of the resulting solution? Assume negligible volume change.
11.An acid-base equilibrium system is created by dissolving 0.20mol CH3COOH in water and diluting the resulting solution to a volume of 1.0 L. What is the effect of adding 0.020 mol CH3COO (aq) to this solution? How will pH change (calculate pH before and after the addition. Ka of CH3COOH is 1.76 x10-5)? How will concentrations of CH3COOH and CH3COO at equilibrium change?
Equal quantities of 0.010M solutions of an acid HA and a base B are mixed. The pH of the resulting solution is 9.4 Part A:Write the equilibrium equation for the reaction between HA and B. Express your answer as a chemical equation. Identify all of the phases in your answer. Part B: Write equilibrium-constant expression for the reaction between HA and B. Part C: If Ka for HA is 8.0×10−5, what is the value of the equilibrium constant for the reaction between HA and B? Express your answer using one significant figure. Part D: What is the value of Kb for B? Express your answer using one significant figure.
Write the chemical reactions whose equilibrium constants are Kp and Ką for imidazole (C,H,N,) and imidazole hydrochloride (C,H,N,H*CI¯), respectively. K, reaction: 2.865 Incorrect K, reaction: 2.323 Incorrect Calculate the pH of a solution prepared by mixing 1.60 g of imidazole with 1.60 g of imidazole hydrochloride and diluting to 100.0 mL. The pKą of imidazole hydrochloride is 6.993. 2.07 pH Incorrect Calculate the pH of the solution if 2.00 mL of 1.06 M HCIO, are added. pH = Incorrect How many milliliters of 1.06 M HCI,, should be added to 1.60 g of imidazole to give a pH of 6.993? 2.865 volume: mL. Incorrect
9. We prepared a solution containing 1.0 mol.L' HF and 1.0 mol.L·' C,H3OH. The K, of hydrofluoric acid and phenol are 7.2 x 104 and 1.6 x 10-10 respectively. What is the pH of this solution? (Hint: find which acid is strongest and make the appropriate assumptions) b. What is the concentration of C,H;O¯ at equilibrium? а.
1. The ionization constant (Kb) of aniline (C6H5NH2) is 2.35 x 10^-5. If 7.285 grams of aniline is dissolved in 100.0 mL of water, what are the equilibrium concentration of all species present?2. A certain acidic vitamin is essential for all mammals since it plays a role in DNA repair and cell signaling. A 0.439M solution of this acid is found to have a pH of 2.607. Based on the table below, what most likely is the identity of thisunknown acid?
A buffer system is prepared by combining 0.603 moles of ammonium chloride (NH4CI) and 0.713 moles of ammonia (NH3). What will the solution pH be if 0.239 moles of the nitric acid (HNO3) is added to the solution. Nitric acid is a strong acid. The K₁ of ammonia is 1.8 x 10-5. (Two decimal places)
1) Write the equilibrium constant expression for the dissociation of acetic acid 2) Vinegar sold commercially is typically 0.8−1.0 M acetic acid. A 1.00 M solution of acetic acid is measured by its pH to have an equilibrium concentration of 4.19×10−3 M for both acetate ions and hydronium ions at room temperature. Assuming [HOAc]0 = 1.00 M, what is the equilibrium concentration of undissociated acetic acid [HOAc]eq to the correct number of significant figures? 3) What is the value of the equilibrium constant Keq for the dissociation according to the concentrations from number 2?
1. The ionization constant (K») of aniline (C6HSNH2) is 2.35 x 10-5, If 7.285 grams of aniline is dissolved in 100.0 mL of water, what are the equilibrium concentration of all species present? 2. A certain acidic vitamin is essential for all mammals since it plays a role in DNA repair and cell signaling. A 0.439 M solution of this acid is found to have a pH of 2.607. Based on the table below, what most likely is the identity of this unknown acid?
For the titration of 50. mL of 0.10 M ammonia with 0.10 M HCI, calculate the pH. For ammonia, NH3, Kp = 1.8 x 10-5. (a) Before the addition of any HCl solution. pH = Use correct number of significant digits; (b) After 20. mL of the acid has been added. pH = Use correct number of significant digits; (c) After half of the NH3 has been neutralized. pH Use correct number of significant digits; (d) At the equivalence point. pH Use correct number of significant digits;
1. The lonization constant (Ks) of pyridine (CsHsN) is 5.62 x 10. If 11.3 grams of sample of pyridine is dissolved in 250.0 mL of water, what are the equilibrium concentration of all species present? 2. A certain acidic vitamin is essential for all mammals since it plays a role in mineral absorption. A 0.125 M solution of this acid is found to have a pH of 2.034. Based on the table below, what most likely is the identity of this unknown acid? (Note: For this problem, treat the acid as if it is a monoprotic acid.) Possible Identity of the Unknown Acid ascorbic acid Ka 7.9x105 citric acid 7.4x10 lactic acid 8.4x10* nicotinic acid 1.4x10