Question 49 5 pts A 1.00 L solution of 0.10 M NH3 and 0.4 M NH4Cl has 0.17 moles of KOH added. What is the pH of the resulting solution? K) (NH3) = 1.8 x 10-5. Report your answer to the nearest whole number Question 50 5 pts Ethanol has a heat of vaporization of 38560 J/mol and a normal boiling point of 352 K. What is the vapor pressure (in torr) of ethanol at 314 K? Report your answer...
6) 15 mL of 0.325 M NaOH is delivered into a 35 mL HOBr solution of unknown concentration. The pH of the final solution is measured to be 7.48. K, for HOBI is 2.0 x 10-9 at 25°C. a. Find [H] in the final solution. b. Find [OH-] in the final solution. c. Find the number of moles of NaOH added during the titration. d. Find the concentrations of OBr" and HOBr in the final solution.
QUESTION 2 The K a of hypobromous acid, HOBr, is 2.6'10-9. Calculate the pH of a solution which is composed of 0.40 M HOBr and 0.40 M NaOBr. a. 9.12 b. 4.49 C. 8.59 d. 0.40 e. 0.80
if a 0.076 M solution of chromic acid - 12 hours 24/48 pH-5.0510 Content attribution CONTENT FEEDBACK Question 25 If a 0.076 M solution of chromic acid, H CrO, is prepared, what is the concentration of HCrO H2CrO4 (aq) + H2O(l-H30"(aq) + HCrO4 (aq) K,I = 9.6 нсо, (aq) + H20(1) H30" (aq) + CrO: (aq) K.-3.2x 10-7 Report your answer with the correct number of significant figures. Provide your answer below
Calculate the pH of the solution made by adding 0.50 mol of HObr in 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HObr is 2.0 * 10^-9
The initial concentration of acid HA in solution is 2.0 M. If the pH of the solution at equilibrium is 2.2, what is the percent ionization of the acid? Remember to report your answer with the correct number of significant figures Sorry, that's incorrect. Try again? [0.032]%
Question 17 5 pts What is the (OH) of a solution with a pH of 5.8. 6.33x 10°M 07.6 x 101 M. 1.58 x 10-6M 1x 10-'M
Question 5 Not complete What is the pH of an aqueous solution composed of 0.52 M NHa* and 0.75 M NH3? (K, of NHa* = 5.6 x 10-19) tion 6 The K, of bicarbonate ion, HCO,, is 4.8 x 10-" What CO,?/HCO,1 ratio is necessary to make a buffer with a pH of 11.30? complete is out of Answer:
Question 5 5 pts Calculate the pH of a solution that contains 0.191 M HNO2 and 0.336 M KNO2. The K, for nitrous acid (HNO2) is 4.5*10-4 3.59
(5 pts) What is the pH of a solution of 0.445 M aminobenzene hydrochloride? 4. K, 2.51x10 pK, 4.601