can anyone help me with number 2 Ive attempted it but need h

can anyone help me with number 2? I\'ve attempted it but need help still,
thanks!

SPcr Shies ur work - answers wishoun supporting woeh wit et vero worth a total or 4.s marks solution of fomic ucid in titrated with Nost util the sehution is 0.45ht n formle w and 0.ss t in sodium formate. Calculate Uhe pI value of shis wolation. O wark) Coruc n bes \"Lian PK >.....6 SM r,4° ,A3\"W- kOuLa, \\.ncoo\" ! yM./Ka , 1.5 tt 39 In this experiment, you will make up a series of buffer solutions by mising Vcwcoo ml or o.soo M acetate and VcH COOH you will make up a series of buffer solutions by mixing Vcuycoc- ml. of 0.500 M acetic acid together. Show algebraically why this will always result in uilibrium concentrations in the buffer. where ICH3COO-] and [ CH3COOH ] are the eq (1.5 marks) Moleso heres isvolne e motes OAC ne les HOAc Vaa 9:

Solution

2. making a buffer solution

[CH3COO-]/[CH3COOH]

when molarity of two solutions are the same = 0.500 M

say we added 10 ml CH3COO- and 30 ml CH3COOH solution

then,

[CH3COO-]/[CH3COOH] = [(0.500 M x 10 ml/40 ml)/(0.500 M x 30 ml/40 ml)]

removing the common terms,

[CH3COO-]/[CH3COOH] = (10 ml/30 ml)

So as can be seen when the initial molarity of the acid and conjugate base are the same, final volume are the same.

Then,

[CH3COO-]/[CH3COOH] = [V(CH3COO-)/(V(CH3COOH)]