Question

How many grams of solid sodium acetate should be added to 1.00 L of a 0.215 M acetic acid solution to prepare a buffer with a pH of 5.489 ? grams sodium acetate g Submit Answer Retry Entire Group 7 more group attempts remaining

Answer 1

we shall solve these problems by using Handoraben equation PH = pka log I salt? - for audi c buffers Tacid) or pon pkot log i salt 2 ) for basic buffers łacida log PH pkat log [ sodium acetate] Eacetic acid or; 5.484 =W95 + I sodium acetate ] 0-215 or [sodium acutale] = = 118 (M) . Amount required molecular wtx molurity = 92 x 1 18 gm = 96.76 g OC25 0 . 215 X @D 5.489 -4.75 27 Given PH = 8.520 =) POH= 14-pH = 5.48 & pkb = 4.75 i pot = pky + log [ Mihad 2 INH 3 ) 5.48= w.ast log [Nhad] 0.211 . [NHAU] = 1.13 CM) 1; Nhull present 0.5 L 0.567 mole 1.13 moles mol.ut y moles = 53.5 x 0.565 g = 30.22 A g (And) required Amount