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#14, #16, #88, #90, #1, #3, #60 & #61
14. Write the formula for the conjugate...
#16, 88 & 90 16. Write the formula for the conjugate acid of each of the...
#16, 88 & 90
16. Write the formula for the conjugate acid of each of the following. a. CH NH2 b. PO, c. CN d. Он e. NO, 88. Suppose that 20.00 mL of a 0.100 M strong acid is titrated with 0.100 M strong base. Now suppose that 20.00 mL of a weak acid is titrated with 0.100 M strong base. Which of the following are the same in the two titrations? a. the initial pH of the titration,...
19. The conjugate base salt to a weak acid (NaA) is titrated with 0.100 M HCl...
19. The conjugate base salt to a weak acid (NaA) is titrated with 0.100 M HCl to its equivalence point. A 25.0 mL solution of a 0.200 M solution of the salt was titrated. The pK, for the unknown conjugate acid is 4.31. (a) Will the equivalence point be acidic or basic for this titration? i.e. pH less than 7.0 or greater than 7.0? (b) What is the volume in mL needed of HCl to reach the equivalence point? (c)...
You have 15.00 mL of a 0.100 M aqueous solution of the weak base C5H5N (Kb...
You have 15.00 mL of a 0.100 M aqueous solution of the weak base C5H5N (Kb = 1.50 x 10-9). This solution will be titrated with 0.100 M HCl. (a) How many mL of acid must be added to reach the equivalence point? (b) What is the pH of the solution before any acid is added? (c) What is the pH of the solution after 10.00 mL of acid has been added? (d) What is the pH of the solution...
2. If HX represents the formula of a weak acid, what is the formula of the...
2. If HX represents the formula of a weak acid, what is the formula of the conjugate base of HX? Let HX represent the formula of a weak acid. Write a balanced chemical equation for the reaction of this weak acid with the strong base NaOH? You may omit any spectator ions if you wish. 3. If a weak acid, HX, is titrated with a strong base such as NaOH, will the equivalence point in the titration occur below pH...
Mark each of the following statements about the ½ equivalence point of an acid-base titration TRUE...
Mark each of the following statements about the ½ equivalence point of an acid-base titration TRUE or FALSE. a. It is the point in the titration when the concentration of weak acid (HA) being titrated is equal to the concentration of the conjugate base (A− ). b. It is the point halfway between the beginning of the titration of a weak acid or weak base and the equivalence point. 2 c. When a strong acid is titrated with a strong...
can i get help with this question please 3. Consider the weak base-strong acid titration of...
can i get help with this question please
3. Consider the weak base-strong acid titration of 25.00 mL of 0.100 M NH, with 0.100 M HCl (weak base, strong acid). The Ks for this weak base is 1.8 x 10 a. Calculate the pH of the solution after the addition of 10.0 mL HCL. b. What is the pH half-way to the equivalence point? c. Calculate the pH at the equivalence point. d. Calculate the pH after the addition of...
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution...
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M NaOH. a) What is the equivalence point volume and 2 equivalence point volume for this titration? Find the pH b) before the titration begins; c) after 20.00 mL of the NAOH has been added, d) after 62.50 mL of the NaOH has been added; and e) after 85.00 mL of the NAOH has been added. 4)...
3) The following plot shows two titration curves, each representing the titration of 50.00 mL of...
3) The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH. Use this graph for question 3a. [12 pts] 14 10 3 6 4 2 0 0 200 40.0 60.0 30.0 100.0 ml of 0.100 M Nadded a. i) Which point, a-d, represents the equivalence point for the titration of a weak acid? [2 pts] ii) Which point, a-d, represents the equivalence point for the titration of a...
In a titration, 25 mL of 0.10 M weak diprotic acid solution was titrated by 0.10 M sodium hydroxide, NaOH, and produ...
In a titration, 25 mL of 0.10 M weak diprotic acid solution was titrated by 0.10 M sodium hydroxide, NaOH, and produced a titration curve listed below. (20 points total) 14,0 3. 12.0 10.0 8.0 pH 6.0 4.0 2.0 10.0 5.0 20.0 30.0 15.0 25.0 Volume of 0.100 M NaOH, mL The acid used in above titration is a weak diprotic acid. Briefly explain how you know it's diprotic from looking at the titration curve and how you know a...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water and titrated against 0.1555 M NaOH, requiring 48.11 mL to of NaOH to reach the end-point. During the titration reaction, the pH of the solution is 3.77 when half of the HA is neutralized and the equivalence-point pH is 8.33. (a) State two ways to standardize the NaOH used in the titration. (b) Suggest and explain an indicator that can be used in the...
#16, 88 & 90
16. Write the formula for the conjugate acid of each of the following. a. CH NH2 b. PO, c. CN d. Он e. NO, 88. Suppose that 20.00 mL of a 0.100 M strong acid is titrated with 0.100 M strong base. Now suppose that 20.00 mL of a weak acid is titrated with 0.100 M strong base. Which of the following are the same in the two titrations? a. the initial pH of the titration,...
19. The conjugate base salt to a weak acid (NaA) is titrated with 0.100 M HCl to its equivalence point. A 25.0 mL solution of a 0.200 M solution of the salt was titrated. The pK, for the unknown conjugate acid is 4.31. (a) Will the equivalence point be acidic or basic for this titration? i.e. pH less than 7.0 or greater than 7.0? (b) What is the volume in mL needed of HCl to reach the equivalence point? (c)...
2. If HX represents the formula of a weak acid, what is the formula of the conjugate base of HX? Let HX represent the formula of a weak acid. Write a balanced chemical equation for the reaction of this weak acid with the strong base NaOH? You may omit any spectator ions if you wish. 3. If a weak acid, HX, is titrated with a strong base such as NaOH, will the equivalence point in the titration occur below pH...
can i get help with this question please
3. Consider the weak base-strong acid titration of 25.00 mL of 0.100 M NH, with 0.100 M HCl (weak base, strong acid). The Ks for this weak base is 1.8 x 10 a. Calculate the pH of the solution after the addition of 10.0 mL HCL. b. What is the pH half-way to the equivalence point? c. Calculate the pH at the equivalence point. d. Calculate the pH after the addition of...
3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M NaOH. a) What is the equivalence point volume and 2 equivalence point volume for this titration? Find the pH b) before the titration begins; c) after 20.00 mL of the NAOH has been added, d) after 62.50 mL of the NaOH has been added; and e) after 85.00 mL of the NAOH has been added. 4)...
3) The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH. Use this graph for question 3a. [12 pts] 14 10 3 6 4 2 0 0 200 40.0 60.0 30.0 100.0 ml of 0.100 M Nadded a. i) Which point, a-d, represents the equivalence point for the titration of a weak acid? [2 pts] ii) Which point, a-d, represents the equivalence point for the titration of a...
In a titration, 25 mL of 0.10 M weak diprotic acid solution was titrated by 0.10 M sodium hydroxide, NaOH, and produced a titration curve listed below. (20 points total) 14,0 3. 12.0 10.0 8.0 pH 6.0 4.0 2.0 10.0 5.0 20.0 30.0 15.0 25.0 Volume of 0.100 M NaOH, mL The acid used in above titration is a weak diprotic acid. Briefly explain how you know it's diprotic from looking at the titration curve and how you know a...
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