In a titration to determine the presence of acetic acid, which indicator would be most appropriate?
Practice Questions
1 question
Q1
In a titration to determine the presence of acetic acid, which indicator would be most appropriate?
Phenolphthalein
Methyl orange
Bromothymol blue
Litmus
Phenolphthalein is the most appropriate indicator for titrating weak acids like acetic acid against strong bases, as it changes color at the relevant pH range.
Questions & Step-by-step Solutions
1 item
Q
Q: In a titration to determine the presence of acetic acid, which indicator would be most appropriate?
Solution: Phenolphthalein is the most appropriate indicator for titrating weak acids like acetic acid against strong bases, as it changes color at the relevant pH range.
Steps: 7
Step 1: Understand what a titration is. It is a method used to determine the concentration of a substance in a solution.
Step 2: Identify the substance being tested. In this case, it is acetic acid, which is a weak acid.
Step 3: Know what acetic acid is being titrated against. It is usually titrated against a strong base, like sodium hydroxide.
Step 4: Learn about indicators. Indicators are substances that change color at a certain pH level, helping to show when the reaction is complete.
Step 5: Find out the pH range where acetic acid and a strong base will react. This typically occurs around pH 8-10.
Step 6: Choose an appropriate indicator. Phenolphthalein is a good choice because it changes color in the pH range of 8.2 to 10, which is suitable for this titration.
Step 7: Conclude that phenolphthalein is the most appropriate indicator for this titration.
