For which of the following mixtures would you use a SRFC (Starting moles, Reacting moles, Final...
For which of the following mixtures would you use a SRFC (Starting moles, Reacting moles, Final moles, Concentration) Table to keep track of amounts?
a. strong acid and weak acid
b. strong acid and weak base
c. weak acid and weak base conjugate pair
d. weak base and water
*Briefly explain why the answers you did not choose are incorrect.
Homework Answers
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For which of the following mixtures would you use a SRFC
(Starting moles, Reacting moles, Final...
Which of the following oxoacids has the smallest value for Ka,1 ? H2TeO3 H2SO3 H2TeO4 H2SeO4...
Which of the following oxoacids has the smallest value for Ka,1 ? H2TeO3 H2SO3 H2TeO4 H2SeO4 H2SeO3 H2SO4 Which of the following choices is appropriate if you have made an HBrO/NaBrO buffer and the pH is 8.0, and you want to have the buffer with equal amounts of conjugate components. Choose all that apply. Add some strong base Add some strong acid Add some weak base Add some weak acid Add some water
32. You have 5.62 moles of HNO3. Answer the following questions based on this: (20 points)...
32. You have 5.62 moles of HNO3. Answer the following questions based on this: (20 points) a. How many grams of HNO3 would be present with 5.62 moles of HNO3 b. What would be the molarity of HNO3 if dissolved in 560 mL of water? c. After dissolving in part b, if you diluted the solution to 1200 mL what would the molarity be? d. Would HNO3 act as a strong base, strong acid, weak base, or weak acid?
Question two A buffer solution is able to maintain a constant pH when small amounts of...
Question two
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 ml solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O2. The initial concentration of both the acid and the base are 0.0100 mol/0.1000...
Which of the following is a characteristic of bases? o taste sour O feel slippery O...
Which of the following is a characteristic of bases? o taste sour O feel slippery O higher than OH concentration O creates hydrogen gases when exposed to reactive metals QUESTION 38 A buffer: O resists changes in pH when small amounts of a strong acid or a strong base are added. o can be made up of a weak acid and its conjugate base. can be made up of a weak base and its conjugate acid. All three of the...
please explain how you got your all your answers 5. Which one of the following conditions...
please explain how you got your all your answers
5. Which one of the following conditions is always TRUE for a titration of a WEAK ACID with a STRONG BASE? a. A colored indicator with a pka less than 7 should be used. b. Equal volumes of weak acid and strong base are required to reach the equivalence point. c. The equivalence point occurs at a pH equal to 7. d. The equivalence point occurs at a pH greater than...
explain ou are given us solutions of the following at 25°C. Predict whether each solution will...
explain ou are given us solutions of the following at 25°C. Predict whether each solution will be acidic, basic, (a) posm at, KC,H,O, The cation, K", belongs to group 1 of the periodic table and will not affect the pH. The anion, C,H,O, solution of potassium acetate --Sec . weak acid and will act as a base, making a (b) barum chlorate, Balco), The cation Therefore, belongs to grove 2 of the periodic table and will not affect the p....
A buffer solution is able to maintain a constant pH when small amounts of acid or...
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 mL solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O,. The initial concentration of both the acid and the base are 0.0100 mol/ 0.1000 L...
Which of the following mixtures does not result in a buffer? A. 25 mL of 0.1M...
Which of the following mixtures does not result
in a buffer?
A. 25 mL of 0.1M NaBrO with 40 mL of 0.2M HBrO
B. 25 mL of 0.1M NaOH with 40 mL of 0.2M HBrO
C. 100 mL of 0.1M HCl with 100 mL of 0.3M NH3
D. 50 mL of 2M NH4Cl with 75 mL of 3M
NH3
E. 25 mL of 0.1M NaOH with 40 mL of 0.2M NH3 (correct
answer)
^ This is how I worked it...
Titration of weak acid with strong base pre-lab Answers can only be entered/graded between 2019-10-24 and...
Titration of weak acid with strong base pre-lab
Answers can only be entered/graded between 2019-10-24 and 2019-10-29 A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.12 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH PH added Half-way Point 17.97 3.66 Equivalence point 35.938.65 How many moles of NaOH have been added at the equivalence point? r mol correct...
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, T...
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...
32. You have 5.62 moles of HNO3. Answer the following questions based on this: (20 points) a. How many grams of HNO3 would be present with 5.62 moles of HNO3 b. What would be the molarity of HNO3 if dissolved in 560 mL of water? c. After dissolving in part b, if you diluted the solution to 1200 mL what would the molarity be? d. Would HNO3 act as a strong base, strong acid, weak base, or weak acid?
Question two
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 ml solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O2. The initial concentration of both the acid and the base are 0.0100 mol/0.1000...
Which of the following is a characteristic of bases? o taste sour O feel slippery O higher than OH concentration O creates hydrogen gases when exposed to reactive metals QUESTION 38 A buffer: O resists changes in pH when small amounts of a strong acid or a strong base are added. o can be made up of a weak acid and its conjugate base. can be made up of a weak base and its conjugate acid. All three of the...
please explain how you got your all your answers
5. Which one of the following conditions is always TRUE for a titration of a WEAK ACID with a STRONG BASE? a. A colored indicator with a pka less than 7 should be used. b. Equal volumes of weak acid and strong base are required to reach the equivalence point. c. The equivalence point occurs at a pH equal to 7. d. The equivalence point occurs at a pH greater than...
explain ou are given us solutions of the following at 25°C. Predict whether each solution will be acidic, basic, (a) posm at, KC,H,O, The cation, K", belongs to group 1 of the periodic table and will not affect the pH. The anion, C,H,O, solution of potassium acetate --Sec . weak acid and will act as a base, making a (b) barum chlorate, Balco), The cation Therefore, belongs to grove 2 of the periodic table and will not affect the p....
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 mL solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O,. The initial concentration of both the acid and the base are 0.0100 mol/ 0.1000 L...
Which of the following mixtures does not result
in a buffer?
A. 25 mL of 0.1M NaBrO with 40 mL of 0.2M HBrO
B. 25 mL of 0.1M NaOH with 40 mL of 0.2M HBrO
C. 100 mL of 0.1M HCl with 100 mL of 0.3M NH3
D. 50 mL of 2M NH4Cl with 75 mL of 3M
NH3
E. 25 mL of 0.1M NaOH with 40 mL of 0.2M NH3 (correct
answer)
^ This is how I worked it...
Titration of weak acid with strong base pre-lab
Answers can only be entered/graded between 2019-10-24 and 2019-10-29 A student peforms a titration, titrating 25.00 mL of a weak monoprotic acid, HA, with a 1.12 M solution of NaOH. They collect data, plot a titration curve and determine the values given in the below table. ml NaOH PH added Half-way Point 17.97 3.66 Equivalence point 35.938.65 How many moles of NaOH have been added at the equivalence point? r mol correct...
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...
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