define ph level
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Describe the pH scale and what it measures??? Introduction and Definitions: Acidic and basic are two extremes that describe a chemical property chemicals. Mixing acids and bases can cancel out or neutralize their extreme effects. A substance that is neither acidic nor basic is neutral. The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.
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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. According to the Compact Oxford English Dictionary, the p stands for the German word for power, potenz, so pH is an abbreviation for power of hydrogen [ 2 ].
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- In chemistry, a measure of the hydrogen ion concentration of a solution. The degree of acidity or alkalinity of a substance is expressed in a pH value. A solution that is neither acid nor alkaline has a pH of 7.
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- I. The Standard Bipolar NPN Transistor 1. Heavily doped emitter; a precisely tailored base profile; a thick, lightly doped N-epi; a heavily doped NBL; and a deep-N+ sinker. Figure 8.13 show the key features of NPN transistor 1) Heavily Doped Emitter i.
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ph A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7. The pH of lemon juice is 2.4; that of household ammonia is 11.5. The normal pH for human blood is 7.4.
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The P/H Scale The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. If a pH is lower than 7 it indicates the solution is an acid. If it is above 7 it is a base or Alkaline. If a pH is a 7 it is neutral. Strong acids have lower pHs than weak acids and strong bases have lower pHs than weak bases. A neutral solution is neither an acid or base. It has a pH of 7. Scientists use a pH number to show the strength of an acid or base. A pH is measured by dipping litmus into solution such as water or other substances. Chemicals that are very basic or acidic are called reactive..
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ph A scale which gives a measure of the acidity of an aqueous solution. A neutral solution has a pH of 7; an acidic solution has a lower value, and an alkaline solution a higher value.
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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 is short for the power of Hydrogen. It's the measure of acidity or alkalinity in a solution. In pure water at 77°F, The hydrogen ions are equal to the concentration of hyd … roxide ions. This is the neutral marking and means the pH level is 7.0.In solutions where the hydrogen ions exceed the concentration of hydroxide ions, the pH falls below 7.0 and is an acid.rinking water has a pH of 7 … , 7 is neutral... neutral is safe. hydrochloric acid has a pH level of fourteen. acids are harmful with a burning sensation when it comes in contact with skin. bases are slippery and bitter. coca-cola has a pH level of about 1.8.
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pH Definition A common pH definition is: . . Blood in the human body should be close to 7.4 on the pH scale. A pH level of less than 7 indicates an acidic solution while a pH greater than 7 indicates an alkaline solution. 7 is the pH level of distilled water.
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Lime, lawns and soil Balancing your soil's pH Levels. The pH rating simply means how much acid (acidity) or how much alkaline (alkalinity) is present in the soil. The pH range is 1 ? 14 and 7 is the mid-point, meaning ? acidity to ? alkalinity.
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pH  (chemistry) pH (chemistry) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic)
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2-Second At-Home Tests to Determine Your pH Level (and foods to eat to fix it) The more ions, the more acidic the solution. The fewer ions the more alkaline (base) the solution. The pH level is a measure of acidity or alkalinity, on a scale of zero to fourteen, with zero being most acid, fourteen being most alkaline and seven being mid-range. The most critical pH balance is in the blood.
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pH and Buffers Defined pH and Buffers Defined. pH is a measure of the concentration of H + [H 3 O + ] ions in a solution. Only the concentration of H + and OH-molecules determine the pH. When the concentration of H + and OH-ions are equal, the solution is said to be neutral. If there are more H + than OH-molecules the solution is acidic, and if there are more OH-than H + molecules, the solution is basic.
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What Are Acids, Bases, and pH All About, Anyway? The pH scale. The term pH symbolizes the hydrogen ion concentration in a solution (for example, what proportion of a solution contains hydrogen ions). The pH scale goes from 1—14. A pH of 7 is neutral, meaning that the amount of hydrogen ions and hydroxide ions in a solution are equal. For example, water has a pH of 7 because when water breaks up, the split is equitable into one hydrogen ion for every hydroxide ion.
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pH Definition and Equation in Chemistry Post. Share. pH Definition: pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline.
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pH Definition and Equation in Chemistry Post. Share. pH Definition: pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. A pH level of is 7.0 at 25°C is defined as ' neutral ' because the concentration of H 3 O + equals the concentration of OH − in pure water. By Anne Marie Helmenstine, Ph.D.
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pH Definition and Equation in Chemistry pH Definition: pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline.
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Soil pH Soil pH. Soil pH is a measure of the acidity and alkalinity in soils. pH levels range from 0 to 14, with 7 being neutral, below 7 acidic and above 7 alkaline. The optimal pH range for most plants is between 5.5 and 7.0; however, many plants have adapted to thrive at pH values outside this range.
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Solutions & the pH Scale/Acids/Bases The pH scale is a measurement system used by chemists to indicate the concentration of this substance in a solution. The neutral point on the pH scale. The substance that dissolves in a solution. This term is used to describe the pH level above 7.
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- pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.
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How to balance your pH and find out if youâre too acidic If you think back to chemistry class, you may recall comparing an acid versus a base, or the importance of pH balance. pH is the measure of the acidity or alkalinity of a solution. The pH scale runs from 0 to 14 — a lower number means a higher level of acidity is present, and higher number indicates a higher level of alkalinity. A solution is considered neutral, neither acid nor alkaline, when it has a pH of 7.
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- 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: pH=-log[H+] concentration, which is read:
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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: