Step Data Trial 1 Trial 2 4 Time (seconds) for color change 08.21 07.28 4 Notes for color change The starting color of the solution is pink...

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Question

Chemistry

Step
Data
Trial1
Trial2
4
Time (seconds) for color change
08.21
07.28
4
Notes for color change
The starting color of the solution is pink and after that itâ€™schanged to Yellow
5
Color change (if any) after one(1)
drop of dilute ammonia
none
none
6
Time (seconds) for color tochange
back
27.56
28.93
7
Number of drops for color tochange
back
4
5
1. What does the number of drops of ammonia water indicate? Inother words, what is their significance, such as if they were thesame for all trials or if they differed?
2.Explain chemically why you could not repeat the stepindefinitely.
3, Using Le Chatelier's Principle, discuss and explain yourresults for when you altered the procedure.

Answer & Explanation Solved by verified expert

3.6 Ratings (443 Votes)

1 Color change directs us to assume presence of two dyes Methyl orange and Phenolphthalein Methyl orange is yellow in acidic pH and Phenolphthalein is pink at basic pH Number of drops of ammonia indicate pH of solution If the pH is lower towards acidic it will take more ammonia water drops to change the color back Numbers of drops See Answer

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Step	Data	Trial1	Trial2
4	Time (seconds) for color change	08.21	07.28
4	Notes for color change	The starting color of the solution is pink and after that itâ€™schanged to Yellow
5	Color change (if any) after one(1) drop of dilute ammonia	none	none
6	Time (seconds) for color tochange back	27.56	28.93
7	Number of drops for color tochange back	4	5