A 100 L Buffer Solution Is 0

question 60

Multiple Choice

A 1.00 L buffer solution is 0.150 M in HC₇H₅O₂ and 0.250 M in LiC₇H₅O₂.Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl.The K_a for HC₇H₅O₂ is 6.5 × 10^-5.

• A) 4.19
• B) 5.03
• C) 4.41
• D) 3.34
• E) 3.97

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Definitions:

Hydrophobic Region

A part of a molecule that is repelled by water and typically soluble in nonpolar solvents.

Hydrogen Bond

A weak bond formed between a hydrogen atom in one molecule and an electronegative atom, such as oxygen or nitrogen, in another molecule, important in the structure of water and biological molecules.

Polar Covalent Bond

A type of chemical bond where a pair of electrons is unequally shared between two atoms.

Water Molecule

A chemical compound consisting of two hydrogen atoms bonded to one oxygen atom, essential for all known forms of life.