Explain the reasons for the trends in Acidic strengths And also tell how Acidic strengths varies in the periodic table. Please do mention the exception case if there is so?

Dear Student,

The acidic and basic character depends on the central atom of a compound. Greater the electronegativity of the central atom, greater is the acidic character. Therefore, acidic strength must follow the trend for electronegativity. As we go from left to right across a period, electronegativity increases and therefore acidic strength increases. On going from top to bottom in a group, electronegativity decreases and so acidic strength decreases.