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For example, a pH of 3 is ten times more acidic than a pH of 4. Likewise, a pH of 3 is one hundred times more acidic than a pH of 5. Similarly a pH of 11 is ten times more basic than a pH of 10. Figure 16.4.1 depicts the pH scale with common solutions and where they are on the scale.
Formula. pH is measured on a logarithmic scale. The formula for pH is. pH = – log 10 [H +] Where [H +] is the hydrogen ion concentration. Range and Indication. The range of pH goes from 0 to 14. A value less than 7 indicates that water is acidic. A value greater than 7 indicates that water is alkaline.
If pH > 7, then the solution is basic. This is known as the pH scale and is the range of values from 0 to 14 that describes the acidity or basicity of a solution. You can use pH to quickly determine whether a given aqueous solution is acidic, basic, or neutral.
30 Ιαν 2023 · The pH scale is logarithmic, meaning that an increase or decrease of an integer value changes the concentration by a tenfold. For example, a pH of 3 is ten times more acidic than a pH of 4. Likewise, a pH of 3 is one hundred times more acidic than a pH of 5. Similarly a pH of 11 is ten times more basic than a pH of 10.
Determine the pH of acidic and basic solutions. As we have seen, [H + ] and [OH − ] values can be markedly different from one aqueous solution to another. So chemists defined a new scale that succinctly indicates the concentrations of either of these two ions.
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Learning Objectives. Define pH. Determine the pH of acidic and basic solutions. As we have seen, [H +] and [OH −] values can be markedly different from one aqueous solution to another. So, chemists defined a new scale that succinctly indicates the concentrations of either of these two ions. pH is a logarithmic function of [H +]: pH = − log[H +]
