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What do scale mean?
The pH scale is from 0 to 14; pH is a measure of acidity/alkalinity of a solution.pH= 7 is neutral; under 7 is acidic, over 7 is alkaline.
What do mean pH scale?
The pH scale is from 0 to 14; pH is a measure of acidity/alkalinity of a solution.pH= 7 is neutral; under 7 is acidic, over 7 is alkaline.
What name is given to the scale that measures acidity and alkalinity?
It is called the pH scale, which is usually considered to mean "power of hydrogen" (acids having a pH of less than7, bases having a pH more than 7).
Enzymes are PH sensetive Exactly what does this mean?
They only function when the acidity or alkalinity of their environment is at a certain level.
A range of values that are used to express the activity or alkalinity of system?
I think you mean the 'acidity', not the activity, of a system; in which case the answer is pH. pH is a measure of the acidity or alkalinity (how basic something is) of a system. pH values range from 1 to 14, with 1 being the most acidic and 14 the most basic. It works on a log scale; i.e., a pH of 2 is ten times more basic than a pH of 1.
What colors do chemical indicators turn and what do the colors mean?
With PH indicators, showing acidity and alkalinity, green is neutral, blue-purple is alkaline, yellow-red is acid.
What do you mean by loudness of sound?
We use a logarithmic scale when there is a wide range of values, and when a change in a value depends not on the absolute size of the change but on proportion to the value itself. Adding 1 to a value is absolutely the same whether the original value is 1 or 1000, a linear scale makes sense. If doubling a value is just the same change whether is it from 1 to 2 or from 1000 to 2000, a logarithmic scale is appropriate. We are going to investigate the decibel scale for loudness. There are two reasons why a logarithmic scale is useful: Quantities of interest exhibit such ranges of variation that a dB scale is more convenient than a linear scale. For example, sound pressure radiated by a submarine may vary by eight orders of magnitude depending on direction. The human ear interprets changes in loudness within a logarithmic scale.
What does the pH number mean?
A pH number is a figure which expresses the acidity or alkalinity of a liquid, and uses a scale in which 7 represents neutral, lower numbers represent acidic substances, and higher numbers represent alkaline substances. If the substance is acidic, it will have more hydrogen ions in it, while if it is alkaline, it will have more hydroxide ions in it. Mathematically, the scale is logarithmical, with the formula being -log 10 c, where c represents the hydrogen ion concentration in moles per liter.
What does purple mean on the pH scale?
If you are using a litmus test, then the blue or purplish color indicates that the pH is above 8.3. However, if you use the universal indicator test, purple means a ph of 11-14, which is indicative of a strong base. pH stands for portenz(concentration) of hydroxide (OH-) ions. Acidity is caused by excess free protons, or Hydrogen (H+), but the logarithmic scale measures concentration or hyroxide (OH-), with 0-3 being highly acidic, and 11-14 being highly basic. Acidity of solutions is measured on a logarithmic scale from 0-14, with 7 being neutral, or pure water. 7->6 or 6->5 is 10 times more acidic and 7->8 or 8->9is 10 times more basic.
What does alkalinty mean?
You mean alkalinity? Alkalinity measures the ability of a solution to neutralize acids to the equivalence point of carbonate or bicarbonate. The alkalinity is equal to the stoichiometric sum of the bases in solution.
What does pH mean in urine?
pH is a way to measure how basic or acidic something is. Human urine runs from nearly 5 to 8 on the scale, but 7 seems to be average. Just for the sake of comparison, filtered water is also a 7 on the pH scale.
What does the number assigned to an earthquake mean?
It indicates the amount of energy released during the earthquake. It is a logarithmic scale, meaning (in this case) that 1 number more on this scale indicates 10 times more energy, 2 more indicates 100 times more energy, etc.
