٢٠:٥٢

00 80 00

:

Discussion

>> A colour change was observed only in strong acid - strong base

titration and weak acid-strong base titration (with 0.10 M NaOH), as the working pH range of the indicator falls to the vertical portion of those reactions.

>> But when the base is diluted, a colour change was not observed, as the pH range of the beetroot indicator doesn't within the rapid pH change of the reaction. |

>> Although a colour change was observed in above two titrations, the most applicable titration is weak acid-strong base titration, because the vertical portion of the reaction shifts upwards.

Conclusion

>>Working pH range of BEETROOT is pH = 10.80 - 11.20

Acidic

RED

Basic

YELLOW

(Above result was obtained on 28" of March 2012 at 11.50 a.m. at B2 102 laboratory under the room temperature 27°C.)

>>BEETROOT is a good indicator.

But it is not a very suitable indicator for laboratory experiments as

It should be prepared at the be experiment is done. The

prepared indicator also cannot be kept for a long time as it is a

↓

تنزيل

حذف

فتح

وضع علامة

>

مشاركة