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What is the trend of acid strength?

Joe Ford

What is the trend of acid strength?

Acid strength increases with : 1. increasing electronegativity of the central atom: The more electronegative the central atom, the more electron drift occurs, polarizing the O-H bond which makes it easier for the molecule to dissociate.

Why does acid strength increase across a period?

Going across a period the acid strength increases as there is an increase in electronegativity and the molecule gets more polar, with the hydrogen getting a larger partial positive charge. This makes it easier to heterlytically cleave the E-H bond to produce a stable anion.

Does acidity increase down the periodic table?

Acidity INCREASES as you go from left to right across the periodic table and DECREASES as you go down a group/column. The opposite is true for Basicity: INCREASES as you go up a group/column and DECREASES as you go from right to left across the periodic table.

What is the trend in acid strength going down a column and what is the trend based on?

Acid strength increases down a column, with the trend being based on atomic size. Larger atoms have longer bonds, longer bonds are weaker bonds, weaker bonds break easier releasing more H+ ions into solution. Acid strength decreases down a column with the trend being differences in electronegativity.

What’s the most corrosive acid?

fluoroantimonic acid

Why is trifluoroacetic acid stronger than trichloroacetic acid?

Re: Why is trichloroacetic acid stronger than acetic acid? Since the Cl atoms in CCl4COOH are more electronegative than H atoms (in CH3COOH), they pull electron density away from the central carbon atom. This causes the carbon atom to pull electron density from the oxygen in the O-H bond, which weakens the O-H bond.

Is trifluoroacetic acid volatile?

TFA as its protonated CF3COOH form is highly volatile. You need to find a stronger acid to transfer TFA to its protonated species. Its a competition reaction – the stronger acid displaces the weaker acid from its salt. Whenever TFA is protonated, if evaporates really easy from your sample.