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Report 4

Determine Commerce Vinegar Rate used by Standard Solution is NaOH Solutions 0,1 M

I.          Propose

To determine commerce vinegar rate used by standard solution is NaOH solutions 0,1 M.

II.         Based theory

Acid and Base reaction can be used to determine the concentration of unknown acid and base solutions. The determination is conducted by titration. Type titration there is 2 :

a.    Acidimetric

Is a base solution with unknown  concentration is titrated with acid.

b.    Alkali metric

Is an Acid solution with unknown  concentration is titrated with base.

At the experiment , we will concentration observation from commerce vinegar rate using by standard solution is NaOH 0,1 M. we do at the experiment titration type Acidimetric.

III.        Tools and material

Burette 50 ml                                                1

Stand                                                  1

Graduated cylinder of 25 ml           1

Erlenmeyer flask of 100 ml                        1

Pasteur pipette                                 2

Test tube                                            1

Test tube shlf                                                1

Chemical glass of 100 ml               3

Measure gourd of 100 ml               1

Tissue

Measure pipette                                1

commerce vinegar rate

PP indicator

Aquades

NaOH 0,1 M                                      50 ml

IV.          Procedure

1.    Prepare tools and material we needed.

2.    Thinning commerce vinegar rate 10 ml with water up to volume 100 ml used by measure gourd.

a.    Measure CH₃COOH counted 100 ml used by measure glass

b.    Move  CH₃COOH which have been measured into the measure gourd up to volume 100 ml

c.    Shake slowly.

3.    Pour NaOH 0,1 M into the burette up to 0 scale used by funnel.

4.    Pour CH₃COOH thinning result into the Erlenmeyer flask counted 20 ml.

5.    Add PP indicator counted 3 drip used by Pasteur pipette into the erlenmeyer flask.

6.    We do titrated, at the same time shaken down Erlenmeyer flask up to the changed color become pink color.

7.    Discontinue titrated.

8.    Repeat procedure 3 – 7 until thrice.

V.           Result of observation

Experiment	CH3COOH volume (ml)	NaOH volume (ml)
1	20	3,5
2	20	3,5
3	20	3,5

VI.       Calculations

a.    Ma. Va = b. Mb. Vb

1.    Ma. 20 = 1. 0,1. 3,5

Ma =  = 0,085 º 0,01M

_·          M₁.V₁ = M_2.V₂

           M₁.10 = 0,01.20

                 M_{1 =} 0,02 M

·         M = p.10. kadar

                    m_m

          0,02 = 1,05.10. kadar

                         60

           1,2 = 10,5. Kadar

      Kadar = 1  %

VII.     Photos

 Titration process

change color at titration process

VIII.    Bibliography

Utami, Budi, Agung Nugroho Catur Saputro, Lina Mahardiani, Sri Yamtinah, Bakti     Mulyani.  2006. Simpati. Surakarta:Grahadi.

Sudarmo, Unggul. 2004. Kimia. Surakarta:Seri Made Simple.

     Susilowati, Endang. 2009. Chemistry. Solo:Tiga Serangkai