What is ph scale what is ph value of salt formed by a weak acid and strong base?
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◇ pH scale : it is a scale used to determine the solution acidity or how the solution basicity
◇ Its range frome 0 : 14 divided into 3 parts
● Acidic from 7 to 0
● Neutral 7
● Basic from 7 to 14
☆ pH of salt solution depend on the strenght of the acid and base forming the salt
◇ If strog acid react with strong base , forming neutral salt pH = 7
◇ If strong acid react with weak base, forming acidic salt , pH <7
◇ If strong base react with weak acid , forming basic salt , pH > 7
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