17. Acid and Base Equilibrium

Which is the strongest acid? (LO 16.4) (a) HClO3 (b) HBrO3 (c) H2SO3 (d) H2TeO3

Consider the molecular models shown here, where X represents a halogen atom. (b) Does the acidity of each molecule increase or decrease as the electronegativity of the atom X increases?

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). c. HBr

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). b. HCl

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). a. HNO3

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). H2SO3

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). c. H2SO4

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). b. HCHO2

Classify each acid as strong or weak. If the acid is weak, write an expression for the acid ionization constant (Ka). a. HF

Which acid in each of the following pairs has the stronger conjugate base? See Table 16.1 to compare the relative strengths of conjugate acid-base pairs. (a) HCl or HF

Identify the stronger acid in each of the following pairs. Explain your reasoning. (b) H3PO4 or H3AsO4

Predict the stronger acid in each pair: (c) HBrO3 or HBrO2

Indicate whether each of the following statements is true or false. For each statement that is false, correct the statement to make it true. (a) In general, the acidity of binary acids increases from left to right in a given row of the periodic table. (b) In a series of acids that have the same central atom, acid strength increases with the number of hydrogen atoms bonded to the central atom. (c) Hydrotelluric acid 1H2Te2 is a stronger acid than H2S because Te is more electronegative than S.

Indicate whether each of the following statements is true or false. For each statement that is false, correct the statement to make it true. (a) Acid strength in a series of H¬A molecules increases with increasing size of A. (b) For acids of the same general structure but differing electronegativities of the central atoms, acid strength decreases with increasing electronegativity of the central atom. (c) The strongest acid known is HF because fluorine is the most electronegative element.

Based on molecular structure, arrange the oxyacids in order of increasing acid strength. Explain your choice. HClO3, HIO3, HBrO3

Based on these molecular views, determine whether each pictured acid is weak or strong.