Acid and Base Experiment

January 23

2012

1. Dilon Damara ( 06 )2. Miftah Farid Hidayatullah ( 20 )3. Nafijah Muliah ( 23 )

XI IPA 5 SMAN 1 GRESIK

Experiment 1

The Effect of acid solutions to the color of litmus paper

Purpose : To investigate the effect of acid solutionss to the color of litmus papers.

Equipments and materials :

- Red and blue litmus paper- Pipette - Well plate- Nitric acid solution- Sulfuric acid solution- Acetic acid solution- Oxalic acid solution

Procedure

1. Place 2 drops of nitric acid solution in a well in the well plate2. Immerse a piece of red litmus paper (about 1,5 cm lenght) into to the solution and

record your observation in the below table. Repeat your experiment using blue litmus paper

3. Repeat steps 1 and 2 using other acid solutions.

Result

Solution Chemical FormulaChanging color of red litmus paper

Changing color of blue litmus paper

Nitric Acid solution HNO Not Change ChangeSulfuric acid solution H2SO4 Not Change ChangeAcetic acid solution CH3COOH Not Change ChangeOxalic acid solution C2SO4 Not Change Change

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Experiment 2 :

The Effect of base solutions to the color of litmus paper

Purpose : To investigate the effect of base solutionss to the color of litmus papers.

Equipments and materials :

- Red and blue litmus paper- Pipette - Well plate- Sodium hydroxide - Ammonia solution- barium hydroxide

Procedure

1. Place 2 drops of spdium hydroxide in a well in the well plate2. Immerse a piece of red blue paper (about 1,5 cm lenght) into to the solution and

record your observation in the below table. Repeat your experiment using blue litmus paper

3. Repeat steps 1 and 2 using other acid solutions.

Result

Solution Chemical Formula Changing color of red litmus paper

Changing color of blue litmus paper

Sodium hydroxide NaOH Change to be blue Not ChangeAmmonia solution NH3 Change to be blue Not Changebarium hydroxide Ba(OH)2 Change to be blue Not Change

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Experiment 3 :

Testing acid and base with litmus paper

Purpose : To test the acid or base in some solutions

Equipments and materials :

- Red and blue litmus paper- Pipette - Well plate- Tap water- Distillated water- Soap water- Orange juice

Procedure

1. Prepare a few pieces of red and blue litmus paper 2. Prepare solutions as listed in the table below. ( Add more solutions according to

your curriosly)3. Take the first solution. Place the red and blue litmus paper in two different watch

glasses and then add a small amount of the solution. Observe and note down the change o color

4. Based on the change of color, determine whether the solution is acidic, basic, or neutral

5. Repeat this activity for the other solutions

Result

SolutionChange of color Is the solution

acidic, basic or neutral ?Red Litmus Blue litmus

Tap water Not Change Not change NeutralDistillated water Not Change Not change NeutralSoap water Change to be blue Not change BaseOrange juice Not change Change to be red Acid

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Experiment 4 :

Measuring the pH of salt solutions

Purpose : To investigate the pH o salt solution.

Equipments and materials :

- HCl 0,1 M- NaOH 0,1 M - NH3 0,1 M- CH3COOH 0,1 M- Tube glass- Universal indicator of paper- pH meter- Pipette

Procedure

1. Prepare the following solutions: 0.1 M HCl, 0.1 M NaOH, 0.1 M NH3, 0,1 M CH3COOH

2. Mix 1 mL of the HCl solution and 1 mL of the NaOH solution3. Measure the pH of the solution using unversal indicator papers or a pH meter4. Repeat the experiment using a different mixture as shown below

Result

Experiment Acid Solution Base Solution pH of solution 1 0.1 M HCl 0.1 M NaOH2 0.1 M HCl 0.1 M NH3

3 0,1 M CH3COOH 0.1 M NaOH4 0,1 M CH3COOH 0.1 M NH3

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PHOTOS

Experiment 1

Experiment 2

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Experiment 3

Experiment 4

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