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pH and pOH

pH and pOH. By: Ben, Josh, Priya, Margarita, Monica, Tharun, Kyra, Cameron. What is pH?. In chemistry, pH is the measure of the acidity of an aqueous solution. pH of less than 7 is acidic Ex: Battery acid, lemon juice pH of more than 7 is basic Ex: Soap, antacid ph of 7 is neutral

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pH and pOH

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  1. pH and pOH By: Ben, Josh, Priya, Margarita, Monica, Tharun, Kyra, Cameron

  2. What is pH? • In chemistry, pH is the measure of the acidity of an aqueous solution. • pH of less than 7 is acidic • Ex: Battery acid, lemon juice • pH of more than 7 is basic • Ex: Soap, antacid • ph of 7 is neutral • Ex: pure water Hydrogen ion concentration is measured with a litmus strip

  3. Calculating pH pH=-log[H+] Ex: What is the pH of an aqueous solution with a hydrogen ion concentration of 4.3x10-4. pH = -log[4.3x10-4] = 3.4

  4. What is pOH? pOH is the measure of the basicity or alkalinity of an aqueous solution. • pOH of less than 7 is basic • pOH of more than 7 is acidic • pOH of 7 is neutral pH and pOH are opposites

  5. Calculating pOH pOH=-log[OH+] Ex: What is the pOH of an aqueous solution with a hydroxide ion concentration of 5.6x10-8? pOH=-log[5.6x10-8]= 7.25

  6. Relationship Between pH and pOH pH + pOH = 14 Ex: If the pOH of RbOH is 8.9, what is its pH? 14 - 8.9 = 5.1

  7. Calculating H+ from pH H+ = 10-pH Ex: What is the hydrogen ion concentration of an aqueous solution of HF with a pH of 6.4? Answer: 3.98 x 10-7

  8. Calculation OH- from pOH OH- = 10-pOH Ex: What is the OH- of lithium hydroxide with a pOH of 12.4 Answer: 3.98 x 10-13

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