The pH value is an indication of the acidity/alkalinity of a solution. More precisely, the pH value is a representation of the concentration of hydrogen cations (hydronium ions) in a solution.
pH (by definition) = -( 10log[H+] ) where [H+]= concentration (mol/l) H+ions.
To determine the pH of a range of solutions, you can use a pH meter, or a universal indicator.
cabbage juice is a natural pH indicator
a pH indicator
0 - 6.9 The lower the pH number the higher the concentration of hydronium ions and higher the strength of acid
B.G. pKa solutions In solutions of equal concentration: pH= pKa Threrfore pKa 4.68.
Hardness
p = -log H= concentration of hydrogen in solution (H+) therefore, pH= -log [H+] or [H+] = 10-pH
pH stands for something along the lines of "Power of hydrogen". It represents the "power" ... or exponent ... of the hydrogen ion concentration.
pH indicator
The meaning of a higher H+ concentration is a low pH.
the concentration of hydrogen ions - H+
To determine the pH of a range of solutions, you can use a pH meter, or a universal indicator.
Sodium hydrogen carbonate is used as an indicator of pH or as a test for the concentration of carbon dioxide. For the preparation of the solution see the link below.
pH doesn't work that way. The pH depends on the concentration as well as the substance; it's meaningless to talk about the pH of a substance without specifying a concentration as well.
cabbage juice is a natural pH indicator
Yes, if the concentration of hydrogen ions is above 1 M, then pH will be negative. An example is Sulfuric acid, which can get a proton concentration up to 18 M which would be a pH of -1.3.
a pH indicator