ph is a concentration unit used to measure the concentration of
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- What is pH. pH is a measure of the hydorgen ion concentration of a solution. Solutions with a high concentration of hydrogen ions have a low pH and solutions with a low concentrations of H+ ions have a high pH. This may seem like a confusion way to express these reationships, and it is, until you understand what pH stands for. The equation that defines pH is given as follows:
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- For the comic strip, see Molarity (comic strip). Molar concentration, also called molarity, amount concentration or substance concentration, is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of amount of substance in a given volume. A commonly used unit for molar concentration used in chemistry is mol/L.
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pH The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.The letters pH stand for power of hydrogen and the numerical value is defined as the negative base 10 logarithm of the molar concentration of hydrogen ions.H = -log. The measurement of the pH of a sample can be done by measuring the cell potential of that sample in reference to a standard hydrogen electrode, as in the accepted procedure for measuring standard electrode potentials.
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Molar concentration A commonly used unit for molar concentration in chemistry is the molar which is defined as the number of moles per litre (unit symbol: mol/L or m). A solution with a concentration of 1 mol/L is equivalent to 1 molar (1 m).
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pH in the Environment pH is one of the most common water quality tests performed. pH indicates the sample's acidity but is actually a measurement of the potential activity of hydrogen ions (H+) in the sample. pH measurements run on a scale from 0 to 14, with 7.0 considered neutral. Solutions with a pH below 7.0 are considered acids. Solutions with a pH above 7.0, up to 14.0 are considered bases. All organisms are subject to the amount of acidity of stream water and function best within a given range. The pH scale is logarithmic, so every one-unit change in pH actually represents a ten-fold change in acidity.
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This business for sale To be technical, the term pH refers to the potential hydrogen-hydroxyl ion content of a solution. Solutions ionize into positive and negative ions. If the solution has more hydrogen (positive) ions than hydroxyl (negative) ions then it is an acid (1-6.9 on the pH scale). Conversely if the solution has more hydroxyl ions than hydrogen it is alkaline (or base), with a range of 7.1-14 on the pH scale.
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ph pH. the symbol for the logarithm of the reciprocal of hydrogen ion concentration in gram atoms per liter, used to describe the acidity or alkalinity of a chemical solution on a scale of 0 (more acidic) to 14 (more alkaline).
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An acid is any substance that increases the H+ concentration An acid is any substance that increases the H+ concentration of a solution A base is any substance that reduces the H+ concentration of a solution Acids and Bases The pH of a solution is determined by the relative concentration of hydrogen ions Acidic solutions have pH values less than 7 Basic solutions have pH values greater than 7
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- Definition of pH. Just as the kilometer is a measure of distance, and the hour a measure of time, the pH unit measures the degree of acidity or basicity of a solution. To be more exact, pH is the measurement of the hydrogen ion concentration, [H + ].
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- pH is a measure of the amount of Hydrogen ions (H+) in a solution. Ions are just atoms that have an electric charge on them, so H+ is a hydrogen atom with charge of 1. Even in pure water ions tend to form due to random processes (producing some H+ and OH- ions).
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- Unformatted text preview: The pH scale is used to describe how acidic or basic a solution is. Organisms are sensitive to changes in pH. An acid is a substance that increases the hydrogen ion concentration in a solution. When hydrochloric acid is added to water, hydrogen ions dissociate from chloride ions: HCl -> H + + Cl − . Addition of an acid makes a solution more acidic. Any substance that reduces the hydrogen ion concentration in a solution is a base. Some bases reduce the H + concentration directly by accepting hydrogen ions.
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- Expressing Concentration. The concentration of a solution is a macroscopic property, represents the amount of solute dissolved in a unit amount of solvent or of solution, and can be expressed in a variety of ways (qualitatively and quantitatively). Qualitative Expressions of Concentration. A solution can be qualitatively described as
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- Stoichiometry allows us to work in solution by giving us the concept of solution concentration, or molarity. Molarity is a unit that is often abbreviated as capital M. It is defined as the moles of a substance contained in one liter of solution.
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What is the unit of measure for pH? pH = -log_10([H+]/mol dm^-3) which explicitly removes the unit by dividing the concentration by the unit. It is a mistake of undergraduate chemistry courses not to use this definition. This explains that pH has no units, because the argument of the log function has had it's units removed.
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pH In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic.
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pH Definition - or what is pH? Calculating pH. The pH definition we use today is the negative logarithm of the hydrogen (H+) ion activity in a given solution. Read What does pH stand for. Note I say hydrogen (H+) ion activity, not concentration.
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pH Meter Introduction to pH Measurement. A pH meter is an instrument used to measure acidity or alkalinity of a solution-also know as pH. pH is the unit of measure that describes the degree of acidity or alkalinity. It is measured on a scale of 0 to 14.
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pH pH Measurement Methods - pH Meter vs pH Strips Visual, photometric, and potentiometric methods can be used to measure the hydrogen ion activity of a solution. Visual and photometric methods rely on color changes of specific organic pigments in order to determine pH.
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- The Simple Definition. pH is a logarithmic measure of hydrogen ion concentration, originally defined by Danish biochemist S ren Peter Lauritz S rensen in 1909 [ 1 ]. pH = -log[H+]. where log is a base-10 logarithm and [H+] is the concentration of hydrogen ions in moles per liter of solution.
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pH pH. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
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Glossary Concentration - The amount or mass of a substance present in a given volume or mass of sample. Usually expressed as microgram per liter (water sample) or micrograms per kilogram (sediment or tissue sample).
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Chemistry: The pH Scale Scientists have come up with the pH scale for determining the concentration of acid in a solution so we can distinguish between solutions with varying acidity. The pH of a solution can be determined using the following equation: 1  pH = -log[H + ].
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PH PH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion—which ordinarily ranges between about 1 and 10−14 gram-equivalents per litre—into numbers between 0 and 14.
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What does the pH scale measure? It's a logarithmic scale of the measure of hydrogen ions in the solution. pH = -log [H+] where log is logarithm to the base 10, and concentration is in moles per liter. emucompboy · 8 years ago. Thumbs up.
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- Typically, the hydrogen ion concentration of a solution is expressed in terms of pH. pH is calculated as the negative log of a solution’s hydrogen ion concentration: pH =−log10\text{pH =} -log_{10}pH =−log​10​​[H\text{[H}[Hopen bracket, H+^+​+​​start superscript, plus, end superscript]\text]]close bracket.
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Carrying Out pH Testing in the Food Industry Accuracy is the most important factor in measuring pH in the food industry. The requirements set forth in the above referenced standard include using a pH meter with a resolution of 0.1 pH units. Most small pocket testers, handheld meters, and benchtop meters will offer this resolution.