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The pH scale is an inverse logarithmic representation of hydrogen proton (H+) concentration. Unlike linear scales, which have a constant relationship between the item being measured and the value reported, each individual pH unit is a factor of 10 different than the next higher or lower unit.
For example, a change in pH from 1 to 2 represents a 10-fold decrease in H+ concentration, and a shift from 1 to 3 represents a one-hundred-fold decrease in H+ concentration.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoAn order of magnitude increase/decrease.
3 pH to 4 pH is a loss of ten times the concentration of H + in solution.
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Why is zero the lowest number on the pH scale?
Well...zero isn't really the lowest number on the pH scale. To simplify things, we teach kids that the scale goes from 0-14, but in reality, a solution can have a negative pH. The pH is the negative log of the hydrogen concentration or -log[H+]. So for -log[H+] to be negative, log[H+] has to be positive; therefore, [H+] would have to be greater than one. A solution that has a negative pH is extremely acidic! For example, a solution with a hydrogen concentration of 2.2 M would have a pH of -log[2.2] = -0.342 The reason we use 0-14 in abstraction is because pH + pOH = 14
What does phtwo mean in sciene?
The phtwo is another name for the ph scale.
Why is a pH scale called a pH scale?
The pH scale is a scale to express the acidity of aqueous solutions (i.e. anything dissolved in water). The scale is divided in equi-distantial units with decimals, comparable with temperature or pressure scales. Commonly it goes from 0 - 14, with 7 being neutral. pH stands for parts of hydrogen. It is the negative log of the hydrogen ion concentration.
What are 3 methods to measure pH?
pH indicator, pH paper, and a pH meter. You can find them on this page http://onsager.bd.psu.edu/halmi/chem3pHS05.pdf
What is the pH of 1M propanoic acid?
- log(1 M propanoic acid) = 0 pH ========( remember, acids may register below scale )
If you have a lower pH will you have higher proton concentration?
Yes. The pH scale is an inverse log scale of the [H].
Why is the PH scale called a log scale?
The pH scale is called a log scale because each unit increases or decreases logarithmically. What this means is that if you were to go from a pH of 7 to a pH of 8 you have increased your concentration of -OH ions ten fold or from a pH of 7 to a pH of 9 would be a 100 fold increase of -OH concentration. Incidentally, pH refers to a mathematical equation where p is the inverse log of H+ (acid/protons) concentration in solition. Thus we are measuring the inverse log concentration of H+ ions or simply put: pH.The equation looks like the following: pH = -log[H+]
Why is the graph of log against pH a straight line?
pH is a logarithmic scale; because of the way calculus and maths works, graphing such a scale against a log results in a straight line.
How are logarithms used in our society?
Many scales such as sound and PH are log scales. The scale used to measure earthquakes is also a log scale. Whenever the data has a very wide range, a log scale might help.
Why is zero the lowest number on the pH scale?
Well...zero isn't really the lowest number on the pH scale. To simplify things, we teach kids that the scale goes from 0-14, but in reality, a solution can have a negative pH. The pH is the negative log of the hydrogen concentration or -log[H+]. So for -log[H+] to be negative, log[H+] has to be positive; therefore, [H+] would have to be greater than one. A solution that has a negative pH is extremely acidic! For example, a solution with a hydrogen concentration of 2.2 M would have a pH of -log[2.2] = -0.342 The reason we use 0-14 in abstraction is because pH + pOH = 14
What makes up PH scale?
The Ph scale doesn't have units it's a model to show where solutions rank based on the -Log of the concentration of H+ ions
Because the pH scale is an inverse log of the hydrogen ion concentration what numbers from the pH scale would be more basic?
pH above 7 till 14 is basic. pH of 14 is most basic
What does the number seven mean on a pH scale?
it is neutral. Water is a 7 on the pH scale
What does phtwo mean in sciene?
The phtwo is another name for the ph scale.
What Does high pH mean on a pH scale?
A pH over 7 is basic.
What ions do the pH scale measure?
H is for Hydrogen. p[H] is a messurement for Hydrogen-ion koncentration and pH for the activity to be correct. the p is for the -log called anti-log (log=logarithm) meaning the exponent (number of the potense) of H ions. pH = -log [H+] or [H+] = 10-pH
Why is a pH scale called a pH scale?
The pH scale is a scale to express the acidity of aqueous solutions (i.e. anything dissolved in water). The scale is divided in equi-distantial units with decimals, comparable with temperature or pressure scales. Commonly it goes from 0 - 14, with 7 being neutral. pH stands for parts of hydrogen. It is the negative log of the hydrogen ion concentration.
