What is the concentration of acetic acid in the 0.100M pH 5.000 buffered solutio

Question

What is the concentration of acetic acid in the 0.100M pH 5.000 buffered solution?

Note 1: Based on the notation you use, you may write that the acetic acid concentration as either [HOAc] or Ca.
Note 2: Don't forget that the formal buffer concentration is 0.1M.
Note 3: Enter your answer below in three signficant figures. Don't worry about writing the units.

What mass of sodium acetate (NaOAc, 82.03 g/mol) would be needed to prepare 1L of the pH 5.000 0.100 M acetic acid/acetate buffer?

Glacial acetic acid is 99.5% acetic acid (f.w. 60.052) by weight and has a density of 1.05g/mL. Calculate the volume of glacial acetic acid needed to make 1L of the 0.100M pH 5.000 buffer.

Show work please

Explanation / Answer

a)let the concentration be x. and that of salt be y.so,

x+y=0.1

also,

5=4.75+log(y/x)

so x=8.138*10^-3 M

y=0.09186 M

b)let the mass be M.so,

mass=0.09186*82.03

=7.535 grams

c)let the volume be v so,

so, 0.995*v*1.05=60*8.138*10^-3

or v=0.4674 mL

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.