Homework Answers
18)
NH4+ is conjugate acid of NH3
To make buffer, we need NH3 in solution.
Answer: d
19)
This is titration of strong acid and weak base.
At equivalence point there would be only conjugate acid present.
Since there is acid at equivalence point, pH would be less than 7
Answer: b
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please answer both questions QUESTION 18 An aqueous solution contains 0.27 M ammonium chloride, NH4Cl. One liter of...
please answer both 1 p QUESTION 4 A 29.9 mL. sample of 0.299 M methylamine, CH3NH2,...
please answer both
1 p QUESTION 4 A 29.9 mL. sample of 0.299 M methylamine, CH3NH2, is titrated with 0.331 M hydroiodic acid, HI at 25 °C. (Kb for methylamine is 4.2 104) What is the pH at the midpoint of the titration? X a 10.318 10.623 c8.318 d. 10.714 e3.377 1 point QUESTION 5 Which of the following aqueous mixtures would make a good buffer system? 0.36 M HNO3 and 0.29 M KNO3 а. 0.35 M NH4Br and 0.37...
An aqueous solution contains 0.18 M ammonium chloride. One liter of this solution could be converted...
An aqueous solution contains 0.18 M ammonium chloride. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.18 mol HNO3 0.17 mol NH3 0.04 mol Ba(OH)2 0.08 mol HNO3 0.17 mol CaCl2
An aqueous solution contains 0.22 M ammonium chloride. One liter of this solution could be converted...
An aqueous solution contains 0.22 M ammonium chloride. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.21 mol CaCl2 B 0.10 mol HBr 0.22 mol HBr 0.05 mol Ca(OH)2 0.21 mol NH;
An aqueous solution contains 0.27 M sodium nitrite. One liter of this solution could be converted...
An aqueous solution contains 0.27 M sodium nitrite. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.26 mol HNO2 0.13 mol Ba(OH)2 0.26 mol NaCl 0.27 mol HBr 0.13 mol HBr
An aqueous solution contains 0.26 M nitrous acid. One Liter of this solution could be converted...
An aqueous solution contains 0.26 M nitrous acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) (select all that apply) 0.13 mol HI 0.065 mol Ba(OH)2 0.27 mol NaNO2 0.27 mol HI 0.26 mol NaNO3
An aqueous solution contains 0.30 M ammonium bromide. One Liter of this solution could be converted...
An aqueous solution contains 0.30 M ammonium bromide. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.)which of the following are accurate 0.14 mol HClO4 0.071 mol Ba(OH)2 0.30 mol HClO4 0.29 mol CaBr2 0.29 mol NH3
An aqueous solution contains 0.21 M ammonium iodide. One Liter of this solution could be converted...
An aqueous solution contains 0.21 M ammonium iodide. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.20 mol NH3 0.21 mol HClO4 0.20 mol CaI2 0.10 mol HClO4 0.049 mol Ca(OH)2 **there are two correct answers**
need both please!!! more than one answer can be chosen for both! An aqueous solution contains...
need both please!!! more than one answer can be chosen for
both!
An aqueous solution contains 0.18 M ammonium chloride. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.18 mol HI 0.17 mol NH 0.08 mol KOH 0.08 mol HI 0.17 mol KCI Submit Answer Retry Entire Group No more group attempts remain An aqueous solution contains 0.26 M potassium hypochlorite. One...
An aqueous solution contains 0.33 M ammonia. One liter of this solution could be converted into...
An aqueous solution contains 0.33 M ammonia. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) MAY HAVE MORE THAN ONE ANSWER A. 0.34 mol NH4Br B. 0.16 mol NaOH C. 0.33 mol NaBr D. 0.16 mol HBr E. 0.34 mol HBr
1. An aqueous solution contains 0.28 M hypochlorous acid. One Liter of this solution could be...
1. An aqueous solution contains 0.28 M hypochlorous acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.)0.14 mol HClO4 0.142 mol NaOH 0.28 mol NaBr 0.29 mol NaClO 0.29 mol HClO4 2. A 1.00 liter solution contains 0.31 M ammonia and 0.40 M ammonium perchlorate. If 0.200 moles of sodium hydroxide are added to this system, indicate whether the following statements are...
please answer both
1 p QUESTION 4 A 29.9 mL. sample of 0.299 M methylamine, CH3NH2, is titrated with 0.331 M hydroiodic acid, HI at 25 °C. (Kb for methylamine is 4.2 104) What is the pH at the midpoint of the titration? X a 10.318 10.623 c8.318 d. 10.714 e3.377 1 point QUESTION 5 Which of the following aqueous mixtures would make a good buffer system? 0.36 M HNO3 and 0.29 M KNO3 а. 0.35 M NH4Br and 0.37...
An aqueous solution contains 0.22 M ammonium chloride. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.21 mol CaCl2 B 0.10 mol HBr 0.22 mol HBr 0.05 mol Ca(OH)2 0.21 mol NH;
An aqueous solution contains 0.27 M sodium nitrite. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.26 mol HNO2 0.13 mol Ba(OH)2 0.26 mol NaCl 0.27 mol HBr 0.13 mol HBr
need both please!!! more than one answer can be chosen for
both!
An aqueous solution contains 0.18 M ammonium chloride. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.18 mol HI 0.17 mol NH 0.08 mol KOH 0.08 mol HI 0.17 mol KCI Submit Answer Retry Entire Group No more group attempts remain An aqueous solution contains 0.26 M potassium hypochlorite. One...
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