Question

QUESTION 21 2.5 points According to the Bronsted-Lowry definition of a base, a base is a substance that O increases the hydroxide ion concentration in water. O can react with water to form OH- O can donate an electron pair to form a covalent bond O Can accept a proton from an acid QUESTION 22 2.5 points How many moles of HCOONa must be added to 1.0 L of 0.10 M HCOOH to prepare a buffer solution with a pH of 3.42 0. O 0.01 O 0.05 O 0.1 O 0.2

Answer 1

·can accept a proton from an acid. Bronted - Lowry bare accepts that one t H+ accepter 22. Toos for 4coon pka = 3.77 (vol. of Hook in La motes of Hcoon (molarity of Hcoon - (0.10) CIM - Olomal holak artid hoor Henderson Hasselbalch equation for buffer acidic ] pH= pk + [ falt] I weak acid mot of weak atrot pH = pka + (mol of face . (Ph-pka ) = mol of falt - ( 3.4 - 317) = mol of talt moles of acid) 10 1o.lomu 0.05 10 mol salt mal of =