7. a. If the pH of 0.10 M ethylamine is 11.82, find K, for ethylamine. b. Using the above result, determine the pH of 0.10 M ethylammonium chloride.

The pH of a 0.92M solution of hypobromous acid (HBRO) is measured to be 4.34. Calculate the acid dissociation constant K, of hypobromous acid. Round your answer to 2 significant digits. K %3D a x10 Canti 2021 McGraw Hill LLC.

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. species relative pH of 0.1 M aqueous solution + C6H5NH3 HCOOH 3 2 HCOO (Choose one) H₂O HONH3 5 + (Choose one) C6H5NH2 (Choose one) H₂O+ (Choose one) HONH2 8 (highest)

7. A 0.050 M solution of an organic acid has a [H*] = 5.9 x 103 M. a) Calculate the pH of the solution. b) What is the % ionization? c) Calculate the Ka of the acid.

b. I'm falling asleep.... The CO₂ concentration in a classroom can increase over the lecture period due to poor ventilation. You decide to measure the pH of pure water in contact with the atmosphere as an indirect way to determine whether you have adequate ventilation. You measure a pH value of 5.3. Assuming equilibrium, i. What is the concentration of CO2 in the classroom? ii. How does the value you calculated compare to the recommended safe level of 800-1000 ppm?

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. species CIO₂ H₂O HCIO, H₂S CHÍNH, CH,NH, H₂O HS relative pH of 0.1 M aqueous solution 6 (Choose one) ▼ (Choose one) Y (Choose one) 8 (highest) (Choose one) Y 1 (lowest)

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select I next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. species ← H₂O* NH3 C,H,OH NH Explanation H₂O HN 3 N₂ C₂H₂O Check relative pH of 0.1 M aqueous solution 1 (lowest) ▶ (Choose one). ▼ 4 3 (Choose one) ▼ (Choose one) ▼ 6 (Choose one) ▼ X 80 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 8 9 O 2 EVEN do Ar

Please answer only part D of this question. Thanks

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. relative pH of 0.1 M aqueous solution species ? 103 |(Choose one) ▼ OH |(Choose one) ▼ H,0 4 HC,04 6. HIO, 1 (lowest) NO2 |(Choose one)

under these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. species CH₂COOH + H₂O* H₂O NO₂ CH₂COO HNO₂ 103 HIO₂ relative pH of 0.1 M aqueous solution 4 (Choose one) 5 (Choose one) (Choose one) 3 (Choose one) 2 X Ś olo 18 Ar