Table of Contents
- 1 Why is methyl orange used as an indicator of a strong acid and strong base titration?
- 2 Which indicator is suitable for the titration of weak acid and strong base?
- 3 Why is methyl orange not a good indicator for weak bases?
- 4 Why is methyl orange not a suitable indicator for titration?
- 5 What happens when methyl orange is added to acid?
- 6 Is methyl orange a weak base?
- 7 Which indicator is used in the titration of strong acid and weak base?
- 8 Why is methyl orange a good indicator for acid base reactions?
Why is methyl orange used as an indicator of a strong acid and strong base titration?
Methyl Orange shows red color in acidic medium and yellow color in basic medium. In titration, initially pH is high, so the solution appears yellow. As acid is added, the solution becomes acidic and methyl orange changes color to red. In the titration of strong acid and weak base, the indicator used is Methyl Orange.
Which indicator is suitable for the titration of weak acid and strong base?
phenolphthalein
For the titration of a weak acid with a strong base, the pH is greater than 7. You want to choose an acid-base indicator that changes color in a range greater than 7. For our example, phenolphthalein would work really well because it changes in a range of 8 to 10.
Why is methyl orange used as an indicator?
Because of its simple and distinct colour shift, methyl orange is a commonly used pH indicator in titrations. It’s commonly used in acid titrations because it changes colour at the pH of a midi-strength acid. In an acidic medium, methyl orange turns red, while in a basic medium, it turns yellow.
Why is methyl orange not a good indicator for weak bases?
For example, methyl orange would be yellow in any solution with a pH greater than 4.4. It couldn’t distinguish between a weak acid with a pH of 5 or a strong alkali with a pH of 14.
Why is methyl orange not a suitable indicator for titration?
– The pH at the end point will be greater than 7, which is slightly alkaline. As the pH at the end point is not at the range of methyl orange (3–5), methyl orange will not be able to act as an indicator in this titration as we will not be able to see a colour change when the reaction completes.
Why is methyl orange not suitable for titration?
Methyl orange is has two color-changing point, one at 3.1 (red-orange) and 4.4 (orange-yellow), both of which are far away from the pH of equivalent point. Therefore, it’s clearly not the appropriate indicator for the titration.
What happens when methyl orange is added to acid?
Methyl orange has the property to color alkaline and neutral water yellow. If the water becomes acidic, it turns red immediately. The point of change is at pH 4.3.
Is methyl orange a weak base?
Methyl Orange is a weak acid which dissociates in water forming orange neutral molecules.
What is methyl orange used for in titration?
methyl orange In the titration of the strong acid and weak base, the indicator used is Methyl orange. Methyl Orange is an indicator that is used to indicate the equivalence point of the acid−base titration. In the acidic environment, it turns red and in the basic environment, or pH of 4.4 and higher, it turns yellow.
Which indicator is used in the titration of strong acid and weak base?
In the titration of the strong acid and weak base, the indicator used is Methyl orange. Methyl Orange is an indicator that is used to indicate the equivalence point of the acid−base titration.
Why is methyl orange a good indicator for acid base reactions?
Thus it acts as a good indicator for distinguishing strong/weak acids. Acid-base reactions often involve trying to obtain pH 7.0 – a neutral solution. But methyl orange shows yellow from pH 4.4 and above thus it does not good for show the end point of a neutralization reaction.
What is the color of methyl orange at equivalence point?
This means the indicator should change color at the equivalence point. For a strong acid strong base reaction, the pH at equivalence is 7, which is outside of the pH range of methyl orange, which means when equivalence point has been reached, methyl orange won’t change color, and we won’t know.