Red cabbage juice is a sensitive acid-base indicator; its colors range from red at acidic pH to yellow in alkaline solutions. What color would red cabbage juice have at the equivalence point when 25 mL of a 0.10 M solution of acetic acid is titrated with 0.10 M NaOH?
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Related questions
Neutralization Reactions
In a clean, small container (glass vial or small paper cup), place about ten drops of an ammonia cleaner and two âsquirtsâ of cabbage juice indicator.
Use a clean medicine dropper and count the number of drops of vinegar required to change the color of the solution from green to purple.
Repeat the above tasks with pickle juice or some solution that you found to have an acid pH slightly higher than vinegar.
Create a data table that summarizes your results of the two titrations.
Neutralization Reactions â comparison of two acid solutions neutralizing a base cabbage juice + ammonia solution
Drops of Ammonia | Vinegar | Pickle juice |
10 | 6 | 8 |
10 | 7 | 7 |
10 | 6 | 8 |
In the titration of ammonia solution with vinegar, and with another acid solution with a slightly higher pH value, how did the amounts needed for the neutralization of the ammonia (signaled by the change from green to purple in the solution containing the ammonia and cabbage juice) compare? How does this comparison match the differences in pH values? What is the basis of any correlation between starting pH values of the two acids and amount required to neutralize the same amount of vinegar solution? Provide explanations for each for the three questions.
Part C: Neutralization Reactions
In a clean, small container (glass vial or small paper cup), place about ten drops of an ammonia cleaner and two âsquirtsâ of cabbage juice indicator.
Use a clean medicine dropper and count the number of drops of vinegar required to change the color of the solution from green to purple.
Repeat the above tasks with pickle juice or some solution that you found to have an acid pH slightly higher than vinegar.
Create a data table that summarizes your results of the two titrations.
Part C Table
Neutralization Reactions â comparison of two acid solutions neutralizing a base cabbage juice + ammonia solution
Insert Table Here
Drops of vinegar | Ammonia | Pickle juice |
First | 6 | 8 |
Second | 8 | 8 |
Third | 7 | 9 |
In the titration of ammonia solution with vinegar, and with another acid solution with a slightly higher pH value, how did the amounts needed for the neutralization of the ammonia (signaled by the change from green to purple in the solution containing the ammonia and cabbage juice) compare? How does this comparison match the differences in pH values? What is the basis of any correlation between starting pH values of the two acids and amount required to neutralize the same amount of vinegar solution? Provide explanations for each for the three questions.