Question

1. Write the equilibrium expression for the autoionization of water. Using this expression define the terms acid and base and pH. 2. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 0.082M solution of triethylamine. 3. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 1.570 M solution of hydrogen cyanide. 4. The acid-dissociation constant for hypochlorus acid is 3.0 X 10-8. Calculate the concentrations of H3O+, CIO-, and HCIO at equilibrium if the initial concentration of HC1O is 0.0090M 5. The active ingredient in aspirin is acetylsalicylic acid (HC,H,O.), a monoprotic acid with a Ka 3.3 X 104. What is the pH obtained by dissolving two extra aspirin tablets containing 500mg of acetylsalicylic acid in 250 mL of water. a. a. The original pain reliever was salicylic acid, but due to the acidic nature of the compound, the side effects were often worse than the pain. Draw the structure of salicylic acid and compare the pKa's for both pain relievers. b. Bufferin how did it work? was a solution to this dilemma....look up what was in Bufferin and b. 0.05 mol of either NaF, NaCl, or NaOCI is dissolved in 0.5 L of water and the pH is 6. determined to be 8.08. Which salt is it? For each of the following please identify the Bronsted Lowry acid, Bronsted Lowry base, 7. conjugate acid, and conjugate base. े H;0" Г Н.о + + а. HI CH3NH ОН + НО b. CH3NH2 + सटे ОН с. СО,2 8. Please write out the reaction for each of the following acids when dissolved in water. Please include the Ka expression, where appropriate. а. HCI b. H2SO3 с. HNO d. HCN НСО + Н.О 9. What mass of HI should be present in 0.025L of water for each of the following pH values? a. рH-2.50 b. pH-0.50 с. рH-1.50 10. Please determine the [H] and pH of a solution of 0.100 M benzoic acid.

Answer 1

Autoionisation of water is a ionization reaction where a water molecule Mo gets deprotonates ie. closes one of uits hydrogen atom to become the hydroxide in on equilibrium reaction is as follows: 2 H2O(l) Hzot (ap) + on a - Ho let ton Definition of acid, base & ph Acids. Its a substance that inizes are when ut is dissolved in water and gives ut ie. Hydrogen in. These substances are called aids - eg. HC, H₂SO4 ete. Buse Substances which when dissolved in Leveter undergoes ionisation and gives onions lie. hydoxide ions are called Bases. Ceg. koh, Naon PH :- pH us a measure of the hydrogen in activity in the aqueous solutions. ar pl=-logo aut or pH = -log, [nt] L ey P1=7 Neutoal selution pn 7 Acidic ca Scannedp With Basic CamScanner'