Methyl Red Is a Common Acid-Base Indicator

question 65

Multiple Choice

Methyl red is a common acid-base indicator.It has a K_a equal to 6.3 × 10^-6.Its un-ionized form is red and its anionic form is yellow.What color would a methyl red solution have at pH = 7.8?

• A)green
• B)red
• C)blue
• D)yellow
• E)violet

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