Acidity and Conjugate Base Stability

The video tutorial explains how acids work, focusing on the dissociation of protons and the formation of conjugate bases. It discusses the role of electronegativity in determining acidity across a row in the periodic table and how size affects acidity down a column. The tutorial compares the stability of different anions and their corresponding acids, emphasizing the importance of size over electronegativity in certain cases. Finally, it compares the acidity of hydrogen compounds with different elements, highlighting the influence of atomic size on acidity.

What happens when an acid dissociates in water?

• It forms hydronium ions and a conjugate base.

• It forms water and a salt.

• It forms hydroxide ions and a conjugate acid.

• It forms hydrogen gas and a metal.

How does electronegativity affect acidity across a row in the periodic table?

• Acidity increases as electronegativity increases.

• Acidity remains constant regardless of electronegativity.

• Acidity is not related to electronegativity.

• Acidity decreases as electronegativity increases.

Why does acidity increase as you move down a column in the periodic table?

• Because electronegativity increases.

• Because electronegativity remains constant.

• Because size decreases.

• Because size increases.

Which of the following is more stable, leading to higher acidity?

• A smaller conjugate base.

• A larger conjugate base.

• A conjugate base with high electronegativity.

• A conjugate base with low electronegativity.

What is the main factor determining the stability of I- compared to F-?

• Electron affinity

• Electronegativity

• Size

• Ionization energy

Which hydrogen compound is the most acidic?

• H2Se

• H2S

• H2Te

• H2O

Why is HF considered a weak acid compared to HI?

• Because HF has a less stable conjugate base.

• Because HF has a more stable conjugate base.

• Because HF is more electronegative.

• Because HF is larger in size.

What happens to the stability of conjugate bases as you move down a column?

• Stability increases.

• Stability fluctuates randomly.

• Stability decreases.

• Stability remains the same.

Which element's conjugate base is most stable due to its size?

• Iodine

• Bromine

• Chlorine

• Fluorine

What is the primary reason for the increased acidity of H2Te compared to H2O?

• Larger size of tellurium.

• Higher ionization energy of tellurium.

• Lower electron affinity of tellurium.

• Higher electronegativity of tellurium.