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pH and Indicators Chemistry Mrs. Coyle
Basic 14>ph>7 Neutral ph=7 Acidic 1<pH<7
Self Ionization of H 2 O H 2 O H + (aq) + OH - (aq) Ion Product Constant K w for Water: K w = [H + ] x [OH - ] =1.0 x 10 -14
For pure H 2 O [H + ] = [OH - ] = 1.0 x 10 -7 M
pH 1909 Soren Sorensen (Danish) pH=-log[H + ] What is the pH of pure water?
Ex 1: Find the pH for [H + ]=10 -3 M Answer: pH=3
Ex 2: Find the pH for [H + ]=5x10 -3 M Answer: pH=2.3
Finding [H + ] from pH [H + ]= 10 -pH
Ex 3: Find the [H + ] for pH=5 Answer: [H + ] = 10 -5 M
Ex 4: Find the [H + ] for pH=5.8 [H + ]= 10 -pH Answer: [H + ] = 1.6x10 -6 M
pOH pH=-log[H + ] pH + pOH=14
Basic(Alkaline) Solutions Acidic Solutions Neutral Solutions
Acids Change phenolphthalein to colorless.
Acids Turn litmus paper from blue to red.
Bases Change phenolphthalein to pink.
Acids, Bases, and Solutions
Acid Base Balance U47192.
PH and Concentration. pH Recall water H 2 O H + + OH - Every water molecule produces one hydrogen ion and one hydroxide ion At equilibrium, K eq = [products]
PH Relative concentration of H + ions in water HOH ↔ H + + OH - O HH
Aqueous solutions & concepts of pH Chapter I. Ion Product constant - water A. Acids→ hydronium ions (H 3 O+) Bases → hydroxide ions (OH-) B.Self.
Ch. 8. pH Scale Used to measure how acidic or basic a substance is Ranges from 0-14.
PH The wonders of water!. Acids Any compound that GIVES OFF H+ ions in solution Any compound that GIVES OFF H+ ions in solution Ex. HCl H+ and Cl- Ex.
Titrations and Indicators IB Chemistry Power Points Topic 18 Acids and Bases
Lesson One pH Scale Objective: To learn about the pH Scale and test some substances for pH.
Chemistry Chapter Acids and Bases. (Self-Ionization of Water) H 2 O + H 2 O H 3 O + + OH - Two water molecules collide to form Hydronium and.
Learning outcomes: To know what the pH scale is. Know how to measure pH Give examples of different acids and alkalis. Read page 56 and 57.
The pH scale.
Ways to measure Acidity/Basicity What is pH? What is pOH?
Acids and Bases. Ionization of Water H 2 O + H 2 O H 3 O + + OH - K w = [H 3 O + ][OH - ] = 1.0
PH Scale. Ion product constant for water K w H 2 O H + + OH - K w = [H + ] [OH - ] = 1.0 X mol/L Since [H + ] = [OH - ] for water Then each equals.
PH and pOH By: Sam F., Sam D., Rochani, Evan, Will, Sherry, Mariana.
PH, Acids and Bases.
PH of Weak Acids AP Chemistry Unit 9 Chapter 14. Strengths of Acids and Bases “Strength” refers to how much an acid or base ionizes in a solution. STRONGWEAK.
PH. pH—Scale to measure how acidic or basic a solution is 0-14 Pure water is 7 and neutral (not an acid or base) Acids—less than 7(lower number more acidic)
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