how does a ph scale work
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Describe the pH scale and what it measures??? 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. For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH 6.
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What does pH measure? The scale is logarithmic, and runs from 0 to 14. A pH of 7 indicates a neutral solution, while lower pH is acidic and higher pH is alkaline. Because the scale is logarithmic, a pH of 5 is ten times more acidic than a pH of 6. What pH literally measures is the concentration of H+ ions in a solution. pH stands for the French pouvoir hydrogène, meaning hydrogen potential. pH is important for many things in biochemistry. Certain bodily fluids have a particular pH that aids their function, like highly acidic gastric acid.
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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.
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Acids Bases and pH Scale Acids Bases and pH Scale. I. Acids *Acids are ionic compounds (a compound with a positive or negative charge) that break apart in water to form a hydrogen ion (H +). *The strength of an acid is based on the concentration of H + ions in the solution.The more H+ the stronger the acid.ny pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid. 0 is the strongest acid and 14 is the strongest base. Indicators -- An indicator is a special type of compound that changes color as the pH of a solution changes, thus telling us the pH of the solution.
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What does PHstand for? Noun. 1. pH scale - (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); pH.
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- 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
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Acids Bases and pH Scale **The pH scale is a measure of the hydrogen ion concentration. It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic). Any pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid. 0 is the strongest acid and 14 is the strongest base.Indicators -- An indicator is a special type of compound that changes color as the pH of a solution changes, thus telling us the pH of the solution.*The pH scale is a measure of the hydrogen ion concentration. It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic). Any pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid. 0 is the strongest acid and 14 is the strongest base.
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- An acid is any ionic compound that releases hydrogen ions (H+) in solution. Ionic compounds are molecules held together by ionic chemical bonds that result from the attraction of oppositely charged atoms, called ions. Article Summary: The pH scale is a measurement of the acidity or alkalinity of a solution. To understand the scale, it is important to first understand what acids and bases are. Acids, Bases, Buffers, and the pH Scale.
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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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- The pH is a measure of the concentration of these. An outline of the method of working out the pH of a strong base. Work out the concentration of the hydroxide ions. Use Kw to work out the hydrogen ion concentration. Convert the hydrogen ion concentration to a pH.
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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 scale and indicators Indicators and the pH scale. When an acid is dissolved in water we get an acidic solution, and alkalis make alkaline solutions. If a solution is neither acidic nor alkaline we call it neutral. Pure water is neutral, and so is paraffin.
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How do pH strips work? Answer Wiki. pH strips are filter paper strips on which a solution called universal indicator has been adsorbed. This solution or rather indicator has a composition such that it gives different colours with substances of different pH, that is substances which have different values of acid dissociation constant at equilibrium. Related Questions.
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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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- Suppose a firm sells widgets for $40. The variable cost per unit equals $15. Fixed costs are equal to $700,000 for a year. Subtract the variable cost per unit of $15 from the $40 price, leaving $25.Divide fixed costs by $25 and you have a breakeven sales volume of 28,000 units.he variable cost per unit equals $15. Fixed costs are equal to $700,000 for a year. Subtract the variable cost per unit of $15 from the $40 price, leaving $25.
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Acids and Bases - Real-life applications The pH scale is actually based on negative logarithms for the values of H 3 O + (the hydronium ion) or H + (protons) in a given substance. The formula is thus pH = −log[H 3 O + ] or −log[H + ], and the presence of hydronium ions or protons is measured according to their concentration of moles per liter of solution.
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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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Importance of a Balanced pH pH is a measure of acidity or alkalinity of a solution. The level of acidity or alkalinity of a solution is expressed as a number from 1 to 14 on the pH scale. The lower the pH number, the more acidic the solution is. The higher a pH number, the more alkaline (or basic) the solution is. A pH measurement of 1 would be the most acidic, 7 neutral, and 14 the most alkaline. The pH scale is logarithmic rather than arithmetic or linear. This means that moving one unit either way on the pH scale results in a 10-fold increase in the degree of alkalinity or acidity.
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How does phenolphthalein work? Part 1 Soap, a weaker base, breaks down a very tiny layer of skin and washes of the bacteria. To determine if something is an acid or a base or to see how strong or weak an acid or a base is, a pH scale is used. The lower the pH of a substance, the more acidic it is.
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- pH is a scale from about 0 to 14 that measures how acidic or basic a solution is. A pH less than 7 is considered acidic, and acidity increases as the pH decreases. A pH gr … eater than 7 is considered basic, and basicness increases as pH increases, up to 14.
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The pH Scale The Effective Range of the pH Scale. It is common that the pH scale is argued to range from 0-14 or perhaps 1-14, but neither is correct. The pH range does not have an upper nor lower bound, since as defined above, the pH is an indication of concentration of H +.
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What does the pH scale measure? The pH value is a measure of the acidity or alkalinity of a solution, the scale goes from 0 to 14. Values below 7 are considered acidic, while those with a value greater than 7 are considered basic. A pH level of exactly 7.0 is defined as being neutral. Source(s): http://en.wikipedia.org/wiki/PH. Vinni · 8 years ago.
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- The pH scale was defined because the enormous range of hydrogen ion concentrations found in aqueous solutions make using H+ molarity awkward. For example, in a typical acid-base titration, [H+] may vary from about 0.01 M to 0.0000000000001 M. It is easier to write the pH varies from 2 to 13.
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pH -- Water properties Not only does the pH of a stream affect organisms living in the water, a changing pH in a stream can be an indicator of increasing pollution or some other environmental factor. 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.
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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.