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The pH of bases is over 7.
Generally, it means nothing.
A decrease in hydrogen ion concentration by factor of 10
A pH equal to 7,00 is the neutral pH.
pH stands for the Power of Hydrogen.
The pH is a measure of the acidity/alkalinity of a solution.
It is the negative value of the 10-base logarithmof [positive real number](cf. mathematics)
the red symbols represent the serial number of the vehicle for identification.
Each increment or step on the pH scale is 1 order of magnitude or 10 times the previous step.
If your firearm is a Browning,then the 2 letters in this serial number represent the year 1978.That is the year of manufacture of your Browning firearm.No value can be assessed unless you provide a Browning model number of name that goes with this serial number,and a brief discription of the overall condition of this firearm.
pH 0-14
PH below 7.