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pH has no unit because it's a it's a logarithmic scale, not a measurement like grams or degrees.
The pH number directly relates mathematically to the actual concentrations in solution. Concentration itself does have units, but pH really only looks at the power (or exponent) of the concentrations. And, for that reason the unit doesn't carry.
For example:
pH = - log [H30+] (mathematical definition)
= negative logarithm of the hydronium ion concentration.
What this means is that if a solution has a concentration of 10-7 M [H30+] or (0.0000001 moles per litre of the hydronium ion), the negative log of this number = 7. Therefore the pH = 7.
But it's not 7 moles per litre or 7 moles or any other transferable unit. It's just 7.
Hope that helps a little.
What else can I help you with?
What is the unit for pH in a solution?
The unit for pH in a solution is a dimensionless unit that measures the acidity or basicity of a solution on a scale from 0 to 14.
What is the unit of measurement for pH?
The unit of measurement for pH is a logarithmic scale ranging from 0 to 14 that measures the acidity or alkalinity of a substance.
Is the pH value unitless?
No, the pH value is not unitless. It is a unit of measurement that indicates the acidity or alkalinity of a substance on a scale of 0 to 14.
Is it true that a ten-fold dilution of a strong acidic solution will decrease the pH by 1?
No, it is false. A ten-fold dilution of an acid will INCREASE the pH by 1 unit. Remember pH is 0-14 where 0 is most acidic. Diluting ten-fold on a logarithmic scale will increase the pH.Conversely, a ten-fold dilution of an alkali/base will increase the pH by 1 unit.
Is a scale that measures the acidity or basicity of a solution along a range of zero to 14?
The pH scale measures the acidity or basicity of a solution on a scale of 0 to 14. A pH of 7 is considered neutral, while lower values indicate acidity and higher values indicate basicity. The scale is logarithmic, so each unit change represents a tenfold difference in acidity or basicity.
What is the unit for pH in a solution?
The unit for pH in a solution is a dimensionless unit that measures the acidity or basicity of a solution on a scale from 0 to 14.
What does every unit on the pH scale represent?
Every unit represent the activity of the ion H+.
What is the unit of measurement for pH?
The unit of measurement for pH is a logarithmic scale ranging from 0 to 14 that measures the acidity or alkalinity of a substance.
What is the relationship between each pH unit on the pH scale?
Each pH unit on the pH scale represents a tenfold change in the hydrogen ion concentration. For example, a pH of 4 has 10 times more hydrogen ions than a pH of 5, and 100 times more hydrogen ions than a pH of 6.
What is the increase in acidity associated with a decrease of one unit on the pH scale?
A decrease of one unit on the pH scale represents a tenfold increase in acidity. This is because the pH scale is logarithmic, meaning each whole number change reflects a tenfold change in hydrogen ion concentration. For example, a solution with a pH of 5 is ten times more acidic than one with a pH of 6.
What are four characteristics of the pH scale?
The pH scale measures the acidity or basicity of a solution on a scale of 0 to 14. A pH of 7 is considered neutral, with lower values indicating acidity and higher values indicating basicity. Each unit change in pH represents a tenfold change in the concentration of hydrogen ions in the solution. The pH scale is logarithmic, meaning a difference of one unit corresponds to a tenfold difference in hydrogen ion concentration.
Is the pH value unitless?
No, the pH value is not unitless. It is a unit of measurement that indicates the acidity or alkalinity of a substance on a scale of 0 to 14.
What is precision pH?
pH meters are precise to +/- 0.1 to +/- 0.01 pH unit (+/- 6 to +/- 0.6 mV) qith a full-meter scale of 14 pH units (about 840 mV)
Is there a two-folded increase in hydrogen for every pH unit as the scale decreases?
ten-folded
Is a single unit change on the pH scale equivalent to 1 percent change in hydrogen ion concentration?
No, a single unit change on the pH scale represents a tenfold change in hydrogen ion concentration, not a 1 percent change. For example, moving from a pH of 5 to a pH of 4 means the hydrogen ion concentration increases by a factor of 10.
Is it true that a ten-fold dilution of a strong acidic solution will decrease the pH by 1?
No, it is false. A ten-fold dilution of an acid will INCREASE the pH by 1 unit. Remember pH is 0-14 where 0 is most acidic. Diluting ten-fold on a logarithmic scale will increase the pH.Conversely, a ten-fold dilution of an alkali/base will increase the pH by 1 unit.
A substance with a pH of 11 is what times more what than a substance with a pH of 8?
A pH of 11 is 1000x more alkaline than a pH of 8. The pH scale is a logarithmic scale. This means that in a pH scale, a change of one whole number represents a tenfold change in the pH. So a pH of 8 is 10x more alkaline than a pH of 7.
