'10 ph' diaporamas de présentation

Acid-Base Equilibria

Acid-Base Equilibria. Aqueous solutions can be classified as acidic, basic, or neutral. This classification scheme is based on the quantities of 2 ions, hydronium ion, H 3 0 1+ and hydroxide ion, OH 1- . Where do these ions come from in solutions of pure water?

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First steps in data analysis with R and Bioconductor

First steps in data analysis with R and Bioconductor. Gregoire Pau, W. Huber, EMBL-EBI Cambridge gregoire.pau@ebi.ac.uk. Motivation. Biology is becoming a computational science Data analysis and mathematical modeling require computational solutions

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Soil Solution Sampling Soluble Complexes Speciation Thermodynamic Stability Constant

Soil Solution Sampling Soluble Complexes Speciation Thermodynamic Stability Constant. Extraction Methods Collect drainage water in situ Reaction with collection vessel Must be at or near saturation High variability Displace with an immiscible liquid

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Soil Organic Matter Biomolecules Organic Acids Carbohydrates Other Humic Substances Composition

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I. Introduction to Acids & Bases

Acids & Bases. I. Introduction to Acids & Bases. electrolytes ? electrolytes. A. Properties. ACIDS. BASES. bitter taste. sour taste. turn litmus red. turn litmus blue. react with metals to form H 2 gas. slippery feel. vinegar, milk, soda, apples, citrus fruits.

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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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Chapter 19

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Calculating pH and pOH Notes

Calculating pH and pOH Notes. Objectives. Calculate pH or pOH from [H + ] or [OH - ] Calculate [H + ] or [OH - ] from pH or pOH. What is pH?. The pH of a solution is a way to express the hydrogen ion concentration [H + ] in a solution Remember that the pH scale ranges from 0-14

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pH Scale

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Bases

Acids. and. Bases. Acid and Base Properties. *Usually, but not always. Base. Acid. Taste. Bitter. Sour. Feel (choose slippery or not slippery). Slippery. Not slippery. pH (# from the key). 8-14. 1-6. Litmus (blue or red). Blue. Red. Phenolphthalein. *Pink. *Cloudy/ white.

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Learning Check pH2

Learning Check pH2. The [OH-] of a solution is 5 x 10 -5 M. What is the [H 3 O + ] of the solution? 1) 2 x 10 - 5 M 2) 1 x 10 10 M 3) 2 x 10 -10 M. Solution pH2. The [OH - ] of a water solution is 5 x 10 -5 M. What is the [H 3 O + ] in the solution?

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Kw, pH

Kw, pH. Kw: the ion-product constant of water. Q: will pure distilled water conduct electricity A: As the demo shows, it will (slightly). If water conducts electricity, ions must exist Water exists as an equilibrium, which is referred to as the self-ionization of water:

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Chemistry Ch. 16.1

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Slide1: BUFFER

Slide1: BUFFER. 1.2 Buffer Atribute : package java.nio; public abstract class Buffer { private int mark = -1; private int position = 0; private int limit; private int capacity; }

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Casio graphics calculators and Chemistry

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pH is a measure of [H + ] pH = - log [H + ]

pH. pH is a measure of [H + ] pH = - log [H + ]. Finding H + from pH. To get [H + ] when you know pH: [H + ] = 10 -pH. pOH. pH + pOH = 10 -14 So pOH = 10 -14 [H + ].

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