Admin Table of Contents
- 1 Which indicator is used in titration of Na2CO3 with HCl?
- 2 Does phenolphthalein react with Na2CO3?
- 3 Why phenolphthalein is not a suitable indicator for the titration of Na2CO3 with HCl?
- 4 Why is phenolphthalein a good indicator for Naoh and HCl?
- 5 Why is phenolphthalein the indicator most often used in a titration?
Which indicator is used in titration of Na2CO3 with HCl?
methyl orange indicator
Theory. Hydrochloric acid solution may be titrated against sodium carbonate solution using methyl orange indicator. When weak base is titrated with a strong acid solution is slightly acidic at end point.
Does phenolphthalein react with Na2CO3?
Phenolphthalein changes its colour from colourless to pink from acidic to basic medium. But sodium carbonate is relatively more basic than sodium bicarbonate and turns the solution to pink when phenolphthalein is added.
Why phenolphthalein is not a suitable indicator for the titration of Na2CO3 with HCl?
Because (as the names suggest) the equivalence point of a titration will result in an acid salt. The greater acidity of the acid overcomes the basicity of the base. Thus it will occur at a pH less than 7. Phenolphthalein is colorless at this neutralization point, and will go colorless at pH 8 before you reach the end.
Why is methyl orange indicator used in HCl and Na2CO3 titration?
Methyl orange changes color in the pH range 3.0 to 4.4 when only one mole of $HCl$ reacts with one mole of sodium carbonate. Phenolphthalein changes color in the pH range of 8.0 to 9.8 when one mole of sodium carbonate is completely neutralized with two moles of $HCl$. Hence the correct option is (B).
wHat happens when phenolphthalein is added to NaHCo3?
Phenolphthalein=Phenolphthalein is a compound mostly used as a ph indicator in acid-base titrations, when reacted with baking soda, phenolphthalein would change colour from colourless to pink because baking soda has a ph of 9. 2.
Why is phenolphthalein a good indicator for Naoh and HCl?
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions.
Why is phenolphthalein the indicator most often used in a titration?
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions. Neutralization is the basis of titration.
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