what is a ph in science
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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. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.
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Acids, Bases, & the pH Scale A base is a substance that accepts hydrogen ions. When a base is dissolved in water, the balance between hydrogen ions and hydroxide ions shifts the opposite way. Because the base soaks up hydrogen ions, the result is a solution with more hydroxide ions than hydrogen ions. This kind of solution is alkaline.o be more precise, pH is the negative logarithm of the hydrogen ion concentration: pH = −log [H+]. The square brackets around the H + automatically mean concentration to a chemist. What the equation means is just what we said before: for each 1-unit change in pH, the hydrogen ion concentration changes ten-fold.
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pH -- Water properties 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.pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.Hs less than 7 are acidic while pHs greater than 7 are alkaline (basic). Normal rainfall has a pH of about 5.6—slightly acidic due to carbon dioxide gas from the atmosphere. You can see that acid rain can be very acidic, and it can affect the environment in a negative way.
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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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What is a pH scale? A pH scale is a measurement system used to indicate the concentration of hydrogen ions in solution; ranges from 0 to 14. In other words, the pH scale shows the acidity or basi…city of a substance. 7 is when the pH of something becomes neutral, for instance, water. The concentration of hydrogen ions determine the acidity or basicity, so water has a concentration of 1x 10 to the negative seventh power. A pH of 6 is a concentration of 10, and gets 10 times more concentrated as the pH gets decreased by 1.
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What does the term pH mean? pH is the measure of the acidity or alkalinity pH means the power of Hydrogen. It is 'minus the decimal logarithm of the hydrogen ion activity in an aqueous solution'. The term was coined by Sørensen, it measures the alkalinity or acidity of a liquid. pH is a measure of the concentration of hydrogen ions [H+] in a solution.
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The P/H Scale 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.
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- The scientific term pH is an abbreviation that stands for potential of hydrogen, which is a measure of the acidity or alkalinity of a solution.The term, which first came into use in 1909, is Germanic in origin and is derived from the word potenz, meaning power, plus H, which is the symbol for hydrogen on the periodic table. Continue Reading.
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What is a pH scale? A pH scale is a measurement system used to indicate the concentration of hydrogen ions in solution; ranges from 0 to 14. In other words, the pH scale shows the acidity or basicity of a substance. 7 is when the pH of something becomes neutral, for instance, water.he pH scale represents the relative concentration of hydrogen ions in a solution. The concentration of hydrogen ions is commonly expressed in terms of the pH scale. Low pH co … rresponds to high hydrogen ion concentration and vice versa.
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- In chemistry, pH is defined as the negative logarithm of the hydrogen-ion activity. More simply, it is. a measure of the relative amount of free hydrogen (H+) and hydroxyl ions (OH-). That is, it tells the. degree to which something—such as soil, water, or any solution—is basic or acidic. pH is reported.
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All-1B-allanswer - CHAPTER 14 CHEMICAL KINETICS PRACTICE... pH. the negative logarithm of the hydrogen ion concentration [H+]; a measure of the degree to which a solution is acidic or alkaline. An acid is a substance that can give up a hydrogen ion (H+); a base is a substance that can accept H+.The more acidic a solution the greater the hydrogen ion concentration and the lower the pH; a pH of 7.0 indicates neutrality; a pH of less than 7 indicates acidity, and a pH of more than 7 indicates alkalinity.H. 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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Using pH as a Health Monitor pH: What does it mean? pH is the abbreviation for potential hydrogen. The pH of any solution is the measure of its hydrogen-ion concentration. The higher the pH reading, the more alkaline and oxygen rich the fluid is. The lower the pH reading, the more acidic and oxygen deprived the fluid is.
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- Soon they outnumber the hydrogen ions, and the water turns alkaline (blue in color). pH is a measure of how acidic a solution is. The pH scale ranges from 0 to 14. Solutions with a pH of less than 7 are acidic, and those with a pH greater than 7 are basic (or alkaline).Distilled water is neutral and has a pH of 7. Knowledge of pH is important because most aquatic organisms are adapted to live in solutions with a pH between 5.0 and 9.0.oon they outnumber the hydrogen ions, and the water turns alkaline (blue in color). pH is a measure of how acidic a solution is. The pH scale ranges from 0 to 14. Solutions with a pH of less than 7 are acidic, and those with a pH greater than 7 are basic (or alkaline).
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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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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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Climate Change Indicators: Ocean Acidity Acidity is commonly measured using the pH scale. Pure water has a pH of about 7, which is considered neutral. A substance with a pH less than 7 is considered to be acidic, while a substance with a pH greater than 7 is considered to be basic or alkaline. The lower the pH, the more acidic the substance.
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What does pH have to do with hydrogen ions? Best Answer: pH is a measure of the concentration of hydrogen ions in solution -- i.e. - the acidity of the solution. The lower the value of pH, the more acidic the solution is. pH is calculated in the following manner: pH = -log [H+] (the log is base 10)
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-   The pH scale is measure of the concentration of Hydrogen ions. It measures how acid or alkaline a solution is. Water has a pH of 7 and is neutral. A pH of less than 7 is … acid and more than 7 is alkaline.Each change in the pH value of 1 (e.g from 7 to 8) indicates a ten fold change in hydrogen ion concentration.he pH scale represents the relative concentration of hydrogen ions in a solution. The concentration of hydrogen ions is commonly expressed in terms of the pH scale. Low pH co … rresponds to high hydrogen ion concentration and vice versa.
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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 ].here 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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- An acid is a substance that can give up a hydrogen ion (H+); a base is a substance that can accept H+. The more acidic a solution the greater the hydrogen ion concentration and the lower the pH; a pH of 7.0 indicates neutrality, a pH of less than 7 indicates acidity, and a pH of more than 7 indicates alkalinity. The pH is used as a measure of whether the body is maintaining a normal acid-base balance.
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pH : a measure of acidity and alkalinity of a solution that is a number on a scale on which a value of 7 represents neutrality and lower numbers indicate increasing acidity and higher numbers increasing alkalinity and on which each unit of change represents a tenfold change in acidity or alkalinity and that is the negative logarithm of the effective hydrogen-ion concentration or hydrogen-ion activity in gram equivalents per liter of the solution; also: the condition represented by a pH number
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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.
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What does PHstand for? pH - (from potential of Hydrogen) 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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What is pH? A pH (potential of Hydrogen) measurement reveals if a solution is acidic or alkaline (also base or basic). If the solution has an equal amount of acidic and alkaline molecules, the pH is considered neutral. Very soft water is commonly acidic, while very hard water is commonly alkaline, though unusual circumstances can result in exceptions.
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ph 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 measures the amount of acidity or alkalinity in a food or solution using a numerical scale between 1 and 14. A pH value of 1 is most acidic, a pH value of 7 is neutral, and values above 7 are referred to as basic or alkaline. Acidified foods have a pH value less than or equal to 4.6.