when few drops of liquid "X" are added to distilled water, it observed that the pH of water decrease. identify the liquid sample X and al So give the reason for the change in the distilled water
Answers
Answer:
1. pH: It is the power of H+ ions in a solution.
It is defined as the negative logarithm of hydrogen ions in a solution. It is used to determine the strength of aci d/base.
The term pH refers to the “potential of hydrogen ion.”
pH is the negative logarithm of the molarity of H+.
PH = – log10 [H+]
H+ is the concentration of hydrogen ion in the solution.
The pH scale is logarithmic, meaning that an increase or decrease of an integer value changes the concentration by a ten fold. 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.
2. pH scale: pH is normally measured in a range of 0-14. [Due to mathematical definition and calculation it is possible to get negative pH and pH above 14]
NCERT Class 10 Science Lab Manual – pH of Samples 1
Explanation: