Question 3 3 pts At 25°C, the pH of pure water is O >7.<14 >0, <7...
e. 59) The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by pH--log (x)where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 3 x 10-3, A) 3.52 B) 2.48 C) 2.52 D) 3.48
e. 59) The pH of...
W y O LLI < < Question 2019 > > Question 2 3 points Save Answer Aniline, CAH NH>, is a weak monoprotic base with Kb = 3.9 x 10-10. Calculate the pH of a 0.00862 M solution of this base. Report your answer to TWO places past the decimal.
Aniline CoH5NH2, a weak base, has a Kb = 4.3 x 10-10 at 25°C. (a) What would be the pH of a 2.05 M solution of aniline? (8 pts) (b) What is the Ka of aniline's conjugate acid? (3 pts)
14. (20 pts total) Consider the following cell reaction at 25 o°C: 2 Al(s)3 Ni (aq)>2 A (aq) +3 Ni(s) Calculate the following: a. (10 pts) Under standard conditions, calculate the Gibbs Free Energy, AG , in J. (Standard reduction potentials are in the last page of the exam) b. (10 pts) At non-standard conditions, if the concentrations of Ni respectively, calculate the E, in V. Assume T 25 °C. and Al are 0.015 M and 0.010 M,
Calculate the pH of 0.586 M anilinium hydrochloride (C6H5NH3CI) solution in water at 25°C, given that Ky for aniline is 3.83 x 10-4.
QUESTION 1 A solution will be basic if: O pH > 7 O pH = 7 O pH < 7
14. Calculate the [H,0+and the pH of each solution. a. 1 x105 M HCI c. 1 x 10-1 M H,SO, b. 5 x 103 M HC1 d. 1 105 MH,SO, 15. Calculate the (OH) and the pOH of each solution in problem 14. (-16. What is [H,O+] in each of the following solutions? a. orange juice, pH = 4.0 b. black coffee, pH = 5.0 c. pure water, pH = 7.0 d. phosphate detergent solution, pH = 9.5 e. seawater,...
- Chem. 132 Homework Problems Fall 2019 PH POH= 14 Chemistry: Homework Problems: You Need to Master Chapter 17 Acids and Bases 1) What is the conjugate acid of HCO3"? 2) What is the conjugate base of H2PO4"? 3) What is the concentration of hydroxide ions in pure water at 30.0°C, if kw at this temperature is 1.47 x 10-14? 4) What is the pH of pure water at 40.0°C if the Kw at this temperature is 2.92 x 10-14?...
Bonus Question (Extra Credit) - You have a 50.0 mL of pure water at pH = 7. Considering the equilibrium of water at 25°C, how many individual H,O* (by count) are in solution? The density of water is 0.998 g/ml.
Question 14 3 pts Which of the following pairs would be appropriate to make a buffer of PH 2.0? O HNO2 and KNO2 O NaHSO4 and H2SO4 Na2SO3 and NaHSO3 Na2HPO4 and Na3PO4 O H2C204 and NaHC204 3 pts Question 15 Which of the following pairs will make a buffer? Question 3 3 pts What is the solubility of SrF2 (s) in moles per liter (mol/L) in pure water? O 3.7 x 10-5 O 5.3 x 105 O 2.8 x...