Determine the pH of a solution that is prepared by dissolving 4.7 g of Ba(OH)2 in 5.6 L water at 25°C. Assume that the volume of the solvent does not change upon addition of the solute. Atomic Weights: Ba = 137.3 g/mol; O = 16.00 g/mol; H = 1.008 g/mol. Express your answer in two decimal places only. Do not put the units.

Consider the following data on some weak acids and weak bases: name hydrocyanic acid hydrofluoric acid acid solution 0.1 M KCN 0.1 M HONH3Br 0.1 M NaCl formula HCN 0.1 M C₂H5NHCI HF Ra X K 4.9 × 10 - 10 6.8 × 10 pH Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. 4 ✓ choose one 1 (lowest) 2 3 4 (highest) choose one S base 3 name Kb formula C5H₂N 1.7 x 10 -9 pyridine - 8 hydroxylamine HONH₂ 1.1 × 107

What is the pH of a solution prepared by adding 18.0 mL of 1.51 M nitric acid to 180.0 mL of 0.150 M dimethylamine solution (CH3)2NH? Round your answer to 2 decimal places.

A chemist must prepare 350.0 mL of hydrobromic acid solution with a pH of 1.80 at 25 °C. He will do this in three steps: • Fill a 350.0 mL volumetric flask about halfway with distilled water. • Measure out a small volume of concentrated (7.0M) stock hydrobromic acid solution and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the volume of concentrated hydrobromic acid that the chemist must measure out in the second step. Round your answer to 2 significant digits. mL x10 Explanation Check O 2022 McGraw Hill LLC, All Rights Reserved. Terms of Use Privacy Center Acce: 80°F Cloudy DELL Esc F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PrtScr Insert Delete F1 "R A # $4 & Backspace 1 3 4 6 80 E Y *00

What is the pH of a solution prepared by adding 60.4 g ethylammonium chloride (C2H5NH3CI, 81.55 g/mol) to 1.00L of a 0.300 M aqueous solution of ethylamine (C2H5NH2, 45.08 g/mol, Kp = 4.3 x 104 at 25°C)? Enter your answer in decimal format with two decimal places (value + 0.02).

A solution containing 0.0138 M maleic acid and 0.0188 M disodium maleate. The K₁ values for maleic acid are 1.20 x 10-2 (Kal) and 5.37 x 10-7 (Ka2). pH = A solution containing 0.0384 M succinic acid and 0.022 M potassium hydrogen succinate. The Ka values for succinic acid are 6.21 x 10-5 (Kal) and 2.31 x 10-6 (Ka2). pH =

A solution is prepared at 25 °C that is initially 0.69M in dimethylamine ((CH3)2NH), a weak base with K = 5.4 × 10-4, and 2.4M in dimethylammonium ((CH3)2NH₂CI). Calculate the pH of the solution. Round your answer to 2 decimal places. chloride pH = ☐

0.185 M in HCHO2 (Ka = 1.8 ×x 10-4) and 0.230 M in HC2H3O2 (Ka = 1.8 × 10-5) Express your answer to two decimal places. ? Find the pH of each mixture of acids. pH = 2.11 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining In a mixture of two acids that have similar K, values, the dissociation of one acid affects the dissociation of the other acid, and vice versa. Prepare two ICE tables (where I means initial, C means change, and E means equilibrium), one for the dissociation of HCHO2 and one for the dissociation of HC2H3O2. Use the given acid-dissociation constants to calculate the amount of H3O+ produced by each acid in the pair. Part D 6.00x10-2 M in acetic acid (Ka = 1.8 × 10-5) and 6.00×102 M in hydrocyanic acid (Ka = 4.9 × 10-10) Express your answer to two decimal places. ? pH =

Consider the following data on some weak acids and weak bases: name acetic acid hydrofluoric acid acid solution 0.1 M KCH3CO₂ 0.1 M CH3NH3Br 0.1 M NaI 0.1 M NaF Ka formula HCH3CO₂ 1.8 x 10 HF 6.8 × 10 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. X -4 pH choose one choose one choose one choose one base Ś Kb formula methylamine CH3NH₂ 4.4 x 107 CHN 1.7×10 9 name pyridine

A chemist must prepare 450.0 mL of nitric acid solution with a pH of 1.60 at 25 °C. He will do this in three steps: • Fill a 450.0 mL volumetric flask about halfway with distilled water. • Measure out a small volume of concentrated (5.0M) stock nitric acid solution and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the volume of concentrated nitric acid that the chemist must measure out in the second step. Round your answer to 2 significant digits. ||mL x10 ?