1.

A solution having a pH of 6 has a proton concentration of _______(a) 10^-6 M(b) 10^6 M(c) 6 M(d) 0.6 M

Answer» Right choice is (a) 10^-6 M

The explanation: pH equals negative logarithmic concentration of protons. Since the pH scale is logarithmic, an increase of one pH unit corresponds to ten-fold decrease in hydrogen ion/ proton concentration.


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