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- Can someone help me with this, An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
- Option 1)
Base Acid End Point
Strong Strong Pink to colourless
- Option 2)
Base Acid End Point
Weak Strong Colourless to pink
- Option 3)
Base Acid End Point
Strong Strong Pinkish red to yellow
- Option 4)
Base Acid End Point
Weak Strong Yellow to pinkish red
Answers (1)
As we learned
Value of p(H) -
Acidic solution has p(H) < 7
Basic solution has p(H) > 7
Neutral solution has p(H) = 7
-
Methyl orange changes its colour in acidic medium when pH is around 3 to 5 and its colour is yellow in basic medium and red in acidic medium so it is used in titration of weak base with strong acid.
Option 1)
Base Acid End Point
Strong Strong Pink to colourless
Option 2)
Base Acid End Point
Weak Strong Colourless to pink
Option 3)
Base Acid End Point
Strong Strong Pinkish red to yellow
Option 4)
Base Acid End Point
Weak Strong Yellow to pinkish red
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