The liquid from a car battery was placed in three test tubes. To the first test tube 2 drops of methyl Orange were added, in the second test tube 2 drops of phenolphthalein were added, in the last test tube 2drops of litmus paper solution was added
State the colour changes in test tubes 1,2 &3
Test tube 1 (methyl Orange): The color change in test tube 1 with 2 drops of methyl orange would depend on the pH of the liquid from the car battery. Methyl orange is an acid-base indicator that changes color in acidic and basic solutions. If the liquid in the car battery is acidic, the methyl orange would turn red. If it is basic, the methyl orange would turn yellow.
Test tube 2 (phenolphthalein): Phenolphthalein is also an acid-base indicator but has a different range of pH sensitivity compared to methyl orange. In acidic solutions, phenolphthalein is colorless. However, in basic solutions, phenolphthalein turns pink or purple. So, if the liquid in the car battery is basic, the phenolphthalein in test tube 2 would change to pink or purple.
Test tube 3 (litmus paper solution): Litmus paper is a pH indicator that turns red in acidic solutions and blue in basic solutions. Therefore, if the liquid in the car battery is acid, litmus paper solution in test tube 3 would turn red. If the liquid is basic, the litmus paper solution would turn blue.
Test tube 1: When 2 drops of methyl orange were added to the liquid from the car battery, it turned from its original color to a shade of red.
Test tube 2: When 2 drops of phenolphthalein were added, the liquid from the car battery in test tube 2 became colorless or remained its original color, depending on the specific properties of the battery liquid.
Test tube 3: When 2 drops of litmus paper solution were added, the color change in the liquid from the car battery in test tube 3 would depend on the pH level of the battery liquid. If the liquid is acidic, it would turn red. If it is basic, it would turn blue. If it is neutral, the color change may be minimal or nonexistent.
To determine the color changes in the three test tubes, we need to understand the role of each type of indicator used.
1. Methyl Orange: Methyl Orange is an indicator that changes color depending on the pH level of a solution. In an acidic solution, it appears red, while in a basic solution, it turns yellow.
2. Phenolphthalein: Phenolphthalein is another indicator that undergoes color changes based on the pH level. In an acidic solution, it remains colorless, while in a basic solution, it turns pink.
3. Litmus Paper: Litmus paper is a type of indicator paper that changes color according to the pH of a solution. In an acidic solution, it turns red, and in a basic solution, it turns blue.
Now, based on the indicators used and their corresponding color changes, we can determine the outcomes in each test tube:
1. Test tube 1 with 2 drops of methyl orange:
- If the liquid from the car battery is acidic, the methyl orange indicator will turn red.
- If the liquid from the car battery is basic, the methyl orange indicator will turn yellow.
2. Test tube 2 with 2 drops of phenolphthalein:
- If the liquid from the car battery is acidic, the phenolphthalein indicator will remain colorless.
- If the liquid from the car battery is basic, the phenolphthalein indicator will turn pink.
3. Test tube 3 with 2 drops of litmus paper solution:
- If the liquid from the car battery is acidic, the litmus paper will turn red.
- If the liquid from the car battery is basic, the litmus paper will turn blue.
Therefore, the color changes in the three test tubes would depend on the pH level of the liquid from the car battery and the corresponding indicator used.