'Poh' diaporamas de présentation

PPC Industry Forum, 03 December 2009

PPC Industry Forum, 03 December 2009. Partial Private Circuits. Disclaimer BT has taken reasonable care to check that the information contained in the following slides was accurate at time of publication.

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Acid/Base Practice

Acid/Base Practice. Pop Quiz!. Name 3 characteristics of both acids and bases. Describe what an indicator is and what we have used them for in this class. Calculate the pH of the following: [H+]=1.47 x 10 -4 M [OH-]=3.55 x 10 -6 M [OH-]= 4.2 x 10 -2 M [H+]= 1.78 x 10 -4 M. *.

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Chapter 16 Acids and Bases

Chapter 16 Acids and Bases. Ionization of Water The pH Scale 7-4. Measuring pH. Why measure pH? Everything from swimming pools, soil conditions for plants, medical diagnosis, soaps and shampoos, etc. Sometimes we can use indicators, other times we might need a pH meter.

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The Chemistry of Acids and Bases

The Chemistry of Acids and Bases. Acids and Bases: Calculate pH/pOH At the conclusion of our time together, you should be able to:. Change any pH reading to pOH Convert pH to concentration of hydronium ion concentrations, hydronium ion concentrations to pH. Review of the pH Scale.

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The Chemistry of Acids and Bases

The Chemistry of Acids and Bases. Acids and Bases: Calculate pH/pOH At the conclusion of our time together, you should be able to:. Change any pH reading to pOH Convert pH to concentration of hydronium ion concentrations, hydronium ion concentrations to pH. Review of the pH Scale.

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Unit 12: Acid and Bases

Unit 12: Acid and Bases. Chapter 19. 4 th Hour. I am gone today so you will go through this Powerpoint to get the notes for objective 38 and the beginning of 39. Remember, there is an open-note quiz tomorrow and I expect a good report from the sub.

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UNIT IV

UNIT IV. pH. Ionization of Water. Pure distilled water still has a small conductivity. Why? 2H 2 O (l) + 59kJ H 3 O + (aq) + OH - (aq). Ionization of Water.

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At any one time, there are incredibly small numbers of hydronium ions and hydroxide ions present.

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Hydrogen Ions and Acidity

Hydrogen Ions and Acidity. The Ionization of Water and pH. Hydrogen Ions in Water. We are used to thinking of water as a pure liquid that contains only H 2 O molecules. However, as a pure liquid, water ionizes into hydrogen ions and hydroxide ions: H 2 O( l ) ? H + ( aq ) + OH - ( aq )

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Hydrogen Ions and Acidity

Hydrogen Ions and Acidity. The Ionization of Water and pH. Hydrogen Ions in Water. We are used to thinking of water as a pure liquid that contains only H 2 O molecules. However, as a pure liquid, water ionizes into hydrogen ions and hydroxide ions: H 2 O( l ) ? H + ( aq ) + OH - ( aq )

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There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ]

pH. pH. There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ] (brackets around a substance means that substances concentration in molarity) To find the pH you need to H + concentration Most of the time you will get an acids concentration. Finding the [H + ].

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There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ]

pH. pH. There is a formula to find pH pH = -log [H + ] or pH = -log [ H 3 O + ] (brackets around a substance means that substances concentration in molarity) To find the pH you need to H + concentration Most of the time you will get an acids concentration. Finding the [H + ].

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Acids, Bases, pH and pOH

Acids, Bases, pH and pOH. Pg 547 # 1-11. Acid concentration ? pH. [H 3 O + ] ? pH 1.0 x 10 -4 mol/L = pH 4 3.16 x 10 - 3 mol/L = -log [ H 3 O + ] = 3.16 x 10 - 3 log+/- = pH 2.50 #7. pH ? Acid concentration. pH 3 ? 1.0 x 10 - 3 mol/L

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Ionization of Water

pH. Ionization of Water. When compounds dissociate/ionize in and aqueous solution, they produce ions - hydronium ( H 3 O + ) and hydroxide ( OH - ) T hese ion concentrations can be expressed more easily as [H 3 O + ] = 1.0 x 10 - 7 M and [OH - ] = 1.0 x 10 - 7 M.

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pOH

pOH. What is the [H + ]?. If the [H + ] = 1 x 10 -7 M, the pH = 7. That works well with acids, but what about bases? Consider sodium hydroxide: NaOH(aq) ? Na + + OH - What is the [H + ]?. We need a new formula!!. Since bases release hyroxides, OH - , we will calculate the pOH.

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Water as and Acid and a Base pH Scale

Water as and Acid and a Base pH Scale. Pg 569 - 581. Ionization and Concentration. Amphoteric substance : can act as an acid or as a base Water is the most common amphoteric substance Self-ionization of water: H 2 O(l) + H 2 O(l) H 3 O + ( aq ) + OH - ( aq ).

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13-3-1 ????????

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Calculating pH and pOH

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