Phenol Red Indicator Changes from Yellow to Red in the PH

question 19

Multiple Choice

Phenol red indicator changes from yellow to red in the pH range from 6.6 to 8.0. State what color the indicator will assume in the following solution: 0.1 M NaCl

• A) red
• B) yellow
• C) red-yellow mixture
• D) orange
• E) The indicator keeps its original colour.

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Understand the concept of the language acquisition device (LAD) and its role in grammar learning.

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