![1. Calculate the [H*] of a solution with a pH of 10.72 a. 5.25x10-4M b. 1.91x10-11M c. 1.07x10-4M d. 5.25x10-11M 2. Arsenic h](http://img.homeworklib.com/questions/3101def0-dc81-11ea-b62e-bd612851fe9f.png?x-oss-process=image/resize,w_560)
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Student Name Course/Section Date Instructor RELATED QUESTIONS 1. A buffer solution is prepared by making a...
Student Name Course/Section Date Instructor RELATED QUESTIONS 1. A buffer solution is prepared by making a solution 0.1M in NH, and 0.2M in NHACI (a) Write the equation for the ionization of NH, in water. (b) Write the expression for the ionization constant, K, for NHg. The value of K, at 25°C is 1.8 x 10 (c) Calculate the [OH-], the [H'), and the pH for this buffer solution. (d) Calculate the (OH), the [H), and the pH for 0.1M...
help me out, please! answer all the multiple choice. (15) A phosphate buffer solution is prepared by mixing 100. m...
help me out, please! answer all the multiple
choice.
(15) A phosphate buffer solution is prepared by mixing 100. mL. of 0.300 M KH PO, and 150.ml 0.500 M K HPO (a) Calculate the molar concentrations of H:PO, and that of HPO,2 in the buffer solution. (b) What is the pH of the buffer solution? (H,PO, has K,-6.2 x 10 (c) Write a net ionic equation for the bufering reaction against a strong acid, Hjo (d) Calculate the new concentration...
please help with this hw ?! Answer the Q. In the spaces below. Use the back...
please help with this hw ?!
Answer the Q. In the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO; c) H20 d) OH e) H3PO4 Ans. a). 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) CO32- b) HPO42. c) H2PO4 d)NH2 e) NH3 Ans. a) b) 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4. Show how...
please answer 1 and both parts of 2 1. Which one of the following sets of...
please answer 1 and both parts
of 2
1. Which one of the following sets of compounds is not characteristic of a buffer? a. HNO3 with NaNO b. NaH POwith Na2HPO: C. NH; with NHACI d. CH3COOH with NaCH3COO 2. What is the pH of the following buffer solutions? a. 0.45 M NH3 and 0.55 M NH-CI. K. (NH3) = 1.8 x 105 b. 0.36 M HCOOH and 0.55 M KHCOO. K. (HCOOH) = 1.8 x 104
CHM 202F19 HW 9B Name Answer the q. in the spaces below. Use the back of...
CHM 202F19 HW 9B Name Answer the q. in the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO; CHO DOH e) HPO4 Ansa) b) c) d) 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) 0,2 b) HPO4? c) H2PO4 d) NH) e) NH3 Ans. a) _ d) e) 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4....
pH LI Calculate the pH of the following solutions: Solution (a) 0.10 M CH3COOH 12.9 (b)...
pH LI Calculate the pH of the following solutions: Solution (a) 0.10 M CH3COOH 12.9 (b) 0.10 M NH3 Mixture of 25.00 mL of 0.10 M HCl + 25.00 mL of 0.10 NaOH Mixture of 20.00 mL of 0.10 M NaOH + 20.00 mL of 0.10 M CHCOOH (e) Mixture of 20,00 mL of 0.10 M HCI + 20.00 mL of 0.10 M NH; Saturated Mg(OH)2 (s) aqueous solution if water's dissociation is negligible K[CH3COOH) = 1.8x10-Kb [NH:] = 1.8*10-9;...
1. Calculate the pH of the following solutions. Show all of your work. a. 0.0050 M...
1. Calculate the pH of the following solutions. Show all of your work. a. 0.0050 M nitric acid, HNO3 b. 0.50 M hydrocyanic acid, HCN Ka = 4.0 x 10-10 2. A student was given the following problem: Calculate the pH of a 0.50 Mama bromide (NHaBr) solution if the Kb of NH3 is 1.8 x 10. The student provided the fo work. Identify the error(s) and calculate the correct pH. NH; (aq) + H20 (1) = NH3 (aq) +...
CHM 202F19 HW 9B Name Answer the Q. in the spaces below. Use the back of the page if necessary. 1. Give the conjuga...
CHM 202F19 HW 9B Name Answer the Q. in the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO3 c) H20 d) OH e) H3PO. Ans. a) 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) CO32 b) HPO 2 c) H2PO. d)NH2 e) NH3 Ans. a) b) _ 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4. Show...
need help!! Use the data in the tables below. Show appropriate work for numerical calculations. K,...
need help!!
Use the data in the tables below. Show appropriate work for numerical calculations. K, values: HCI HNO) H.SO HSO, HPO HF HNO, HCOOH strong strong strong 13 x 10 7.5 x 10 17.1 x 10 4.5 x 10- 1.7 x 104 CH3COOH CsHsNH" H2CO3 H2PO4 NH, HCN IHCO, HPO4 1.8 x 10 5.9 x 10 4.2 x 10 6.2 x 10 5.6 x 10- 4.9 x 10 4.8 x 10-11 4.8 x 10-D Kip values: 8 CaCO3 CaF24...
please show me how to answer these 13. Which of the following combinations would be best...
please show me how to answer these
13. Which of the following combinations would be best to buffer an aqueous solution at a pH of 2.0? a. H3PO4 and H2PO4, Kat = 7.5 x 103 b. HNO2 and NO2, Ka 4.5 x 10 c. CH3COOH and CH3COO, Ka 1.8 x 105 d. H2PO and HPO 2, Ka2 6.2x 10 14. Molecules or ions that can alternately behave as either a Bronsted-Lowry acid or base are called a. polyanions b. hydronium...
Student Name Course/Section Date Instructor RELATED QUESTIONS 1. A buffer solution is prepared by making a solution 0.1M in NH, and 0.2M in NHACI (a) Write the equation for the ionization of NH, in water. (b) Write the expression for the ionization constant, K, for NHg. The value of K, at 25°C is 1.8 x 10 (c) Calculate the [OH-], the [H'), and the pH for this buffer solution. (d) Calculate the (OH), the [H), and the pH for 0.1M...
help me out, please! answer all the multiple
choice.
(15) A phosphate buffer solution is prepared by mixing 100. mL. of 0.300 M KH PO, and 150.ml 0.500 M K HPO (a) Calculate the molar concentrations of H:PO, and that of HPO,2 in the buffer solution. (b) What is the pH of the buffer solution? (H,PO, has K,-6.2 x 10 (c) Write a net ionic equation for the bufering reaction against a strong acid, Hjo (d) Calculate the new concentration...
please help with this hw ?!
Answer the Q. In the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO; c) H20 d) OH e) H3PO4 Ans. a). 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) CO32- b) HPO42. c) H2PO4 d)NH2 e) NH3 Ans. a) b) 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4. Show how...
please answer 1 and both parts
of 2
1. Which one of the following sets of compounds is not characteristic of a buffer? a. HNO3 with NaNO b. NaH POwith Na2HPO: C. NH; with NHACI d. CH3COOH with NaCH3COO 2. What is the pH of the following buffer solutions? a. 0.45 M NH3 and 0.55 M NH-CI. K. (NH3) = 1.8 x 105 b. 0.36 M HCOOH and 0.55 M KHCOO. K. (HCOOH) = 1.8 x 104
CHM 202F19 HW 9B Name Answer the q. in the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO; CHO DOH e) HPO4 Ansa) b) c) d) 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) 0,2 b) HPO4? c) H2PO4 d) NH) e) NH3 Ans. a) _ d) e) 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4....
pH LI Calculate the pH of the following solutions: Solution (a) 0.10 M CH3COOH 12.9 (b) 0.10 M NH3 Mixture of 25.00 mL of 0.10 M HCl + 25.00 mL of 0.10 NaOH Mixture of 20.00 mL of 0.10 M NaOH + 20.00 mL of 0.10 M CHCOOH (e) Mixture of 20,00 mL of 0.10 M HCI + 20.00 mL of 0.10 M NH; Saturated Mg(OH)2 (s) aqueous solution if water's dissociation is negligible K[CH3COOH) = 1.8x10-Kb [NH:] = 1.8*10-9;...
1. Calculate the pH of the following solutions. Show all of your work. a. 0.0050 M nitric acid, HNO3 b. 0.50 M hydrocyanic acid, HCN Ka = 4.0 x 10-10 2. A student was given the following problem: Calculate the pH of a 0.50 Mama bromide (NHaBr) solution if the Kb of NH3 is 1.8 x 10. The student provided the fo work. Identify the error(s) and calculate the correct pH. NH; (aq) + H20 (1) = NH3 (aq) +...
CHM 202F19 HW 9B Name Answer the Q. in the spaces below. Use the back of the page if necessary. 1. Give the conjugate bases for the following Bronsted-Lowry acids: a) H2SO4 b) HNO3 c) H20 d) OH e) H3PO. Ans. a) 2. Give the conjugate acids for the following Bronsted-Lowry bases: a) CO32 b) HPO 2 c) H2PO. d)NH2 e) NH3 Ans. a) b) _ 3. Calculate the pH of a 0.025 M solution of barium hydroxide. 4. Show...
need help!!
Use the data in the tables below. Show appropriate work for numerical calculations. K, values: HCI HNO) H.SO HSO, HPO HF HNO, HCOOH strong strong strong 13 x 10 7.5 x 10 17.1 x 10 4.5 x 10- 1.7 x 104 CH3COOH CsHsNH" H2CO3 H2PO4 NH, HCN IHCO, HPO4 1.8 x 10 5.9 x 10 4.2 x 10 6.2 x 10 5.6 x 10- 4.9 x 10 4.8 x 10-11 4.8 x 10-D Kip values: 8 CaCO3 CaF24...
please show me how to answer these
13. Which of the following combinations would be best to buffer an aqueous solution at a pH of 2.0? a. H3PO4 and H2PO4, Kat = 7.5 x 103 b. HNO2 and NO2, Ka 4.5 x 10 c. CH3COOH and CH3COO, Ka 1.8 x 105 d. H2PO and HPO 2, Ka2 6.2x 10 14. Molecules or ions that can alternately behave as either a Bronsted-Lowry acid or base are called a. polyanions b. hydronium...
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