Sch4u Wednesday May 18 Assignment 3 Ph And Poh Part A Conjugate Acid Base Pairs Practice Write The Equation For The 1 (70.47 KiB) Viewed 15 times
Sch4u Wednesday May 18 Assignment 3 Ph And Poh Part A Conjugate Acid Base Pairs Practice Write The Equation For The 2 (43.59 KiB) Viewed 15 times
SCH4U Wednesday, May 18" Assignment #3 pH and pOH Part A: Conjugate Acid-Base Pairs Practice Write the equation for the reaction of each acid and base given to you in the table below. For each reaction, assume the left side of the reaction equation will show a Bronsted-Lowry acid reacting with water and setting up an equilibrium. (5 marks) Acid Base Reaction HCH, COO CH,COO- HF F. H.CO. HCO, HNO. NO, НСО, HSO Part B: pH and POH pH is a unitless number used to convey the acidity of a substance without having to deal with numbers in scientific notation. You can go between pH and concentration with these equivalent formulae: pH = -log[H,0%) <-> [H,0") = 10 The pH value tells us about the acidity of a solution: pH = 7 = neutral pH <7 - acidic pH > 7 = basic pOH is just like pH, except it uses the hydroxide ion concentration: pOH = -log(OH] => [OH] - 10 If you have one of pH and pOH, you can find the other (at SATP) pH + pOH = 14 Example Calculation: Calculate the concentrations of H, and OH and the values of pH and pOH for a 0.042 mol/L H2SO4/ solution.
What is the pH when the [H,0"]=0.0235 mols/L? Problem 7 (5 marks) A solution is created by measuring 3.60 x 10 moles of NaOH and 5.95 x 10moles of HCl into a container and then water is added until the final volume is 1.00 L. What is the pH of this solution? (Hint: Assume an acid:base ratio of 1:1) TOTAL 125
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