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Chapter 19: Q19.46P (page 874)

Why is the centre of the buffer region of a weak acid鈥搒trong base titration significant?

Short Answer

Expert verified

The pH of a solution is equal to the pKa of a weak acid. Thus, the centre of the buffer region of a weak acid鈥攕trong base titration is critical.

Step by step solution

01

Definition of titration

Titration, also called titrimetry, is a chemical qualitative analytical technique for determining the concentration of a specific analyte in a mixture.

02

Step 2: The significance of the centre of the buffer region of a weak acid–strong base titration

The concentration of a weak acid and its conjugate base are equal at the centre of the buffer area of a weak acid鈥攕trong base titration. At this point, a solution's pH equals a weak acid鈥檚. As a result, the buffer's central section is crucial.

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Most popular questions from this chapter

What is the purpose of an acid-base buffer?

student wants to dissolve the maximum amount ofCaF2 (Ksp=3.2脳10-11)to make1L of aqueous solution.

(a) Into which of the following solvents should she dissolve the salt?

localid="1664178101553" (I)Purewater(II)0.01MHF

(III)0.01鈥塎鈥夆赌塏补翱贬 (IV)0.01鈥塎鈥夆赌塇颁濒 (V)0.01鈥�M鈥夆赌塁补(OH)2

(b) Which would dissolve the least amount of salt?

Calculate the molar solubility ofAg2SO4in

(a)0.22 M AgNO3and

(b)0.22 M Na2SO4. (See Appendix C.)

A buffer consists of 0.22M KHCO3and 0.37MK2CO3. Carbonic acid is a diprotic acid withKa1= 4.5脳10-7andKa2= 4.7脳10-11. (a) Whichvalue is more important to this buffer? (b) What is the buffer pH?

When0.84 g of ZnCl2is dissolved in 245 mL of 0.150 M , NaCNwhat are [Zn2+] , [Zn(CN)42-] , and [[CN-]Kfof Zn(CN)42-=4.2脳1019]?
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