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If methyl orange is used as a solution ...

If methyl orange is used as a solution at pH = 2 containing the indicator would be

A

Orange

B

Yellow

C

Colorless

D

Red

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The correct Answer is:
To determine the color of methyl orange at a pH of 2, we can follow these steps: ### Step 1: Understand the pH scale The pH scale ranges from 0 to 14, where: - pH < 7 indicates an acidic solution - pH = 7 indicates a neutral solution - pH > 7 indicates a basic (alkaline) solution ### Step 2: Identify the pH of the solution In this case, the pH of the solution is given as 2, which is clearly in the acidic range (pH < 7). ### Step 3: Know the color change of methyl orange Methyl orange is an acid-base indicator that changes color depending on the pH of the solution: - Below pH 3.1, methyl orange appears red. - Between pH 3.1 and 4.4, it transitions from red to orange. - Above pH 4.4, it appears yellow. ### Step 4: Analyze the pH of the solution Since the pH of the solution is 2, which is below 3.1, we can conclude that methyl orange will exhibit its red color in this acidic environment. ### Conclusion At a pH of 2, the color of methyl orange will be **red**.
To determine the color of methyl orange at a pH of 2, we can follow these steps: ### Step 1: Understand the pH scale The pH scale ranges from 0 to 14, where: - pH < 7 indicates an acidic solution - pH = 7 indicates a neutral solution - pH > 7 indicates a basic (alkaline) solution ...
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Knowledge Check

  • Methyl orange is an example of:

    A
    acid dye
    B
    azo dye
    C
    mordant dye
    D
    both (a) and (b)

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