11.82

SECTION 11

TABLE 11.28 Titrimetric (Volumetric) Factors (

Continued

)

Sodium thiosulfate

The following factors are the equivalent of 1 mL of

normal

sodium

thiosulfate.

Where the normality of the

solution being used is other than normal, multiply the factors given in the table below by the normality of the

solution employed.

Substance

Formula

Grams

Acetone

(CH

3)2CO

0.0096801

Ammonium chromate

(NH

4)2CrO 4

0.050690

Antimony

Sb

0.06088

Antimony trioxide

Sb

2O

3

0.07287

Bleaching powder

CaOCl

2

0.063493

Bromine

Br

0.079909

Chlorine

Cl

0.035453

Chromic oxide

Cr

2O

3

0.02533

Chromium trioxide

CrO

3

0.033331

Copper

Cu

0.06354

Copper oxide

CuO

0.07954

Copper sulfate

CuSO

4

0.15960

Copper sulfate

CuSO

4 · 5H2O

0.24968

Iodine

I

0.126904

Lead chromate

PbCrO

4

0.10773

Lead dioxide

PbO 2

0.11959

Nitrous acid

HNO

2

0.023507

Potassium chromate

K

2CrO

4

0.064733

Potassium dichromate

K

2Cr

2O

7

0.049032

Red lead

Pb

3O

4

0.34278

Sodium chromate

Na

2CrO

4

0.053991

Sodium dichromate

Na

2Cr

2O

7

0.043661

Sodium dichromate

Na

2Cr

2O

7 · 2H2O

0.049666

Sodium nitrite

NaNO

2

0.034498

Sodium thiosulfate

Na

2S 2O

3

0.15811

Sodium thiosulfate

Na

2S 2O

3 · 5H2O

0.24818

Sulfur

S

0.016032

Sulfur dioxide

SO

2

0.032031

Tin

Sn

0.059345

Alkaline

arsenite,

0.1 N

As(III) to As(V). Dissolve

4.9460ofprimaryg standard grade As

2O 3

in

40

mL

of 30% NaOH

solution. Dilute with

of 200watermL. Acidify

the solution

with 6

N

HCl to the acid color of methyl red indicator. Add to this solution

of NaHCO

40 g

3 and dilute

to

1

L.

Ceric

sulfate,

0.1

N

Ce(IV) to Ce(III). Dissolve

63of.26cerium(IV)g

ammonium sulfate di-

hydrate in

500 mL

of

2

N sulfuric acid. Dilute

the

solution to

and1L standardize against

the