Question

given temperature foart em to reach equilibrium e con 15) Pure Solic and pure liquide are excluded from equilibrium constant pre Cheric £69 kg 19) If a reaction is endothermic, the reaction temperature results in an ineren 20) A solution of ammonia is 2.0% ionized at 25.0 °C. What was the original concentration in M) of the ammonia solution? The Kb at 25.0 °C for ammonia is 1.8 10-5 21) A solution of formic acid is 3.0% dissociated at 25.0 °C. What is the original concentration (in M) of the formic acid solution? The Ka at 25.0°C for formic acid is 1.8 10-4 0 0.2M 22) What is the pH of a sodium acetate (NaC2H302) solution prepared by adding 0.820 grams of sodium acetate to 100.0 ml of water at 25.0 °C? The Ka at 25.0 °C for acetic acid is 1.8 10-5 23) What is the pH of a sodium formate (NaCHO2) solution prepared by adding 0.680 grams of sodium formate to 100.0 ml of water at 25.0 °C? The Ka at 25.0 °C for formic acid is 18 10-4 23 24) 24) Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 177 10-5

please answer 23 and 24
*please show all work and calculations *

Answer 1

23 on a Hoona = 7+ ka + 1 3 lage 10 Мы с о- 68 x 10 68 100 - от м. Ка - 1-3 хоч г. * 3х3 16 на 1 + + 18% - 0-5 Тек, 2381 - Cn COONa+ Ho 24) Ch Coon + Naon 65 %doo oo X6:5 Somю. lem my p P,th t(Ach, Solo - Acidic buffer is formed PM pka + lay [salt] 5 м.) . Ч-16 +1, 5° | 300 3| 3 0 Ph - 41,