Homework Answers
The HF / F- conjugate pair buffer should be used to maintain a low pH. Option C.
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Question 4 Homework - Unanswered If you wanted to create a buffer with a fixed pH...
Bleach is a common household cleaner that removes stains, disinfects, and can be used to whiten...
Bleach is a common household cleaner that removes stains, disinfects, and can be used to whiten clothes. The % ionization curve for hypochlorite is shown to the right. The primary ingredient of household bleach is sodium hypochlorite (NaCl), which is typically in a concentration around 0.67 M of the base OCI. What is the pH of household bleach? 1001.------- 1 1- % OCI ------- -- - - 1 ILI I - - 50 L 1 TT +- - - --...
QUESTION 25 2.5 points Which acid, together with its sodium salt, would be best for preparing a buffer with a pH =...
QUESTION 25 2.5 points Which acid, together with its sodium salt, would be best for preparing a buffer with a pH = 4.5? ° HCN (Ka = 4.9 x 10-10) PH °C3H502H (Ka = 1.3 x 10-5) O HF (Ka=6.8 x 104) CIC2H202H (Ka - 1.4 x 103)
Question 10 Homework. Unanswered A T-bond with semi-annual coupons has a coupon rate of 7%, face...
Question 10 Homework. Unanswered A T-bond with semi-annual coupons has a coupon rate of 7%, face value of $1,000, and 2 years to maturity. If its yield to maturity is 5%, what is its Macaulay Duration? Answer in years, rounded to three decimal places. Numeric Answer: 1.898 1.898 You are incorrect -------------- Answered - Incorrect 1 attempt left. Change your responses to resubmit
You need to make a buffer solution with pH of 8.0. You have the following reagents...
You need to make a buffer solution with pH of 8.0. You have the following reagents on your shelf: HC3H5O3 Ka=1.4*10-4 NaF HF Ka=6.6*10-4 Tris-base HC2H3O2 Ka=1.8*10-5 NH3 HClO Ka=2.9*10-8 NaC2H3O2 Tris-HCl Ka=8.3*10-9 NaClO NH4Cl Ka=5.6*10-10 NaC3H5O3 a) Which reagents would you use to make the buffer solution. Briefly explain why you would choose these. b) In what ration of molar concentrations would you combine them?
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...
Acetylation of ferrocene and column chromatography Lab 4: Question 3 Homework • Unanswered Important ... The...
Acetylation of ferrocene and column chromatography
Lab 4: Question 3 Homework • Unanswered Important ... The solvent is changed from petroleum ether to diethyl ether after the ferrocene is collected from the column. Why not use diethyl ether the entire time? Because diethyl ether is more polar than petroleum ether Because petroleum ether selectively elutes ferrocene since it contains more ether oxygens than diethyl ether Because diethyl ether would lead to a poorer separation of ferrocene and acetylferrocene Both a...
PL69 Homework • Unanswered You witness a person hyperventilate for a period of time before someone...
PL69 Homework • Unanswered You witness a person hyperventilate for a period of time before someone hands them a brown paper bag to breathe into. After taking some breaths into the bag, their breathing rate begins to normalize. Which of the following is NOT true of this scenario? O A The brown paper bag increased the amount of CO2 that the person was breathing into the body 0 B The kidneys began to increase bicarbonate levels in the body to...
I added everything thing. this is the lab question you need to solve. First assigned buffer...
I added everything thing.
this is the lab question you need to solve.
First assigned buffer pH: 2.031 Second assigned buffer pH: 9.171 Available Buffer Systems (acid/ base) pka of Conjugate Acid 2.847 4.757 malonic acid/ monosodium malonate acetic acid/ sodium acetate ammonium chloride/ ammonia triethylammonium chloride/ triethylamine 9.244 10.715 1) Buffer system details: Given pH Name and volume conjugate acid Name and volume conjugate base 2) Calculations for preparation of high capacity buffer system. Introduction In this experiment, you...
Hey guys, I am having a lot of trouble with my homework. Could you please help?...
Hey guys, I am having a lot of trouble with my homework. Could
you please help? I thumbs up anyone who gives a thorough
explanation and shows the work! I really need to understand these
concepts!
Thank you guys!
1) The Ka for HCN is 4.9 ~ 10-10. What is the value of Kb for CN-? 2) Using the data in the table for 0.10 M aqueous species at 25 °C, which conjugate base below is the weakest base? Explain...
Hey guys, I am having a lot of trouble with my homework. Could you please help?...
Hey guys, I am having a lot of trouble with my homework. Could
you please help? I thumbs up anyone who gives a thorough
explanation and shows the work! I really need to understand these
concepts!
Thank you!
1) The Ka for HCN is 4.9 ~ 10-10. What is the value of Kb for CN-? 2) Using the data in the table for 0.10 M aqueous species at 25 °C, which conjugate base below is the weakest base? Explain your...
Bleach is a common household cleaner that removes stains, disinfects, and can be used to whiten clothes. The % ionization curve for hypochlorite is shown to the right. The primary ingredient of household bleach is sodium hypochlorite (NaCl), which is typically in a concentration around 0.67 M of the base OCI. What is the pH of household bleach? 1001.------- 1 1- % OCI ------- -- - - 1 ILI I - - 50 L 1 TT +- - - --...
QUESTION 25 2.5 points Which acid, together with its sodium salt, would be best for preparing a buffer with a pH = 4.5? ° HCN (Ka = 4.9 x 10-10) PH °C3H502H (Ka = 1.3 x 10-5) O HF (Ka=6.8 x 104) CIC2H202H (Ka - 1.4 x 103)
Question 10 Homework. Unanswered A T-bond with semi-annual coupons has a coupon rate of 7%, face value of $1,000, and 2 years to maturity. If its yield to maturity is 5%, what is its Macaulay Duration? Answer in years, rounded to three decimal places. Numeric Answer: 1.898 1.898 You are incorrect -------------- Answered - Incorrect 1 attempt left. Change your responses to resubmit
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...
Acetylation of ferrocene and column chromatography
Lab 4: Question 3 Homework • Unanswered Important ... The solvent is changed from petroleum ether to diethyl ether after the ferrocene is collected from the column. Why not use diethyl ether the entire time? Because diethyl ether is more polar than petroleum ether Because petroleum ether selectively elutes ferrocene since it contains more ether oxygens than diethyl ether Because diethyl ether would lead to a poorer separation of ferrocene and acetylferrocene Both a...
PL69 Homework • Unanswered You witness a person hyperventilate for a period of time before someone hands them a brown paper bag to breathe into. After taking some breaths into the bag, their breathing rate begins to normalize. Which of the following is NOT true of this scenario? O A The brown paper bag increased the amount of CO2 that the person was breathing into the body 0 B The kidneys began to increase bicarbonate levels in the body to...
I added everything thing.
this is the lab question you need to solve.
First assigned buffer pH: 2.031 Second assigned buffer pH: 9.171 Available Buffer Systems (acid/ base) pka of Conjugate Acid 2.847 4.757 malonic acid/ monosodium malonate acetic acid/ sodium acetate ammonium chloride/ ammonia triethylammonium chloride/ triethylamine 9.244 10.715 1) Buffer system details: Given pH Name and volume conjugate acid Name and volume conjugate base 2) Calculations for preparation of high capacity buffer system. Introduction In this experiment, you...
Hey guys, I am having a lot of trouble with my homework. Could
you please help? I thumbs up anyone who gives a thorough
explanation and shows the work! I really need to understand these
concepts!
Thank you guys!
1) The Ka for HCN is 4.9 ~ 10-10. What is the value of Kb for CN-? 2) Using the data in the table for 0.10 M aqueous species at 25 °C, which conjugate base below is the weakest base? Explain...
Hey guys, I am having a lot of trouble with my homework. Could
you please help? I thumbs up anyone who gives a thorough
explanation and shows the work! I really need to understand these
concepts!
Thank you!
1) The Ka for HCN is 4.9 ~ 10-10. What is the value of Kb for CN-? 2) Using the data in the table for 0.10 M aqueous species at 25 °C, which conjugate base below is the weakest base? Explain your...
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