Which of the Following Indicators Would Be the Best to Use

question 11

Multiple Choice

Which of the following indicators would be the best to use when 0.050 M benzoic acid (K_a = 6.6 $\times$ 10^-5) is titrated with 0.05 M NaOH?

• A)bromphenol blue,pH range: 3.0-4.5
• B)bromcresol green,pH range: 3.8-5.4
• C)alizarin,pH range: 5.7-7.2
• D)phenol red,pH range: 6.9-8.2
• E)phenolphthalein,pH range: 8.0-10.1

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Definitions:

Equal Sign

In programming, it is used as an assignment operator to assign values to variables; in mathematics and comparisons, it signifies equality between two expressions.

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CharAt Method

A method used to retrieve a character at a specified index within a string.