Define pH poH & activemass
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pH- It stands for potential of hydrogen
lt measures the acidity and alkalinity of water soluble substances.
A pH value is a number from 1 to 14, with 7 as neutral solution.
- value below 7 indicates the acidity
- value higher 7 indicates the alkalinity
poH
pOH is a measure of hydroxide ion (OH-) concentration. It is used to express the alkalinity of a solution. Aqueous solutions at 25°C with pOH less than 7 are alkaline, pOH greater than 7 are acidic and pOH equal to 7 are neutral.
Active mass
. 1 : the concentration of a reacting substance expressed usually in moles per liter.
2 : the concentration of the portion of a dissolved electrolyte that is dissociated into ions and hence is capable of carrying the electric current.
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