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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: 777888 on November 22, 2004, 12:42:05 PM

Title: Acid-Base indicator
Post by: 777888 on November 22, 2004, 12:42:05 PM

Hi, is thee colour of "Bromthymol Blue" green(No H+ or OH- added)?

When adding HCl, the "Bromthymol Blue" becomes yellow because in the equilibrium reaction HIn = H+ + In-, addition of H+ shifts the reaction left. But as the colour becomes yellow, is that called a new equilibrium state?

Title: Re:Bromthymol Blue
Post by: 777888 on November 22, 2004, 03:44:41 PM

Also, generally, if there is a shift to one side of the reaction! After shifting, will it reach a new state of equilibrium?

Title: Re:Acid-Base indicator
Post by: AWK on November 23, 2004, 03:49:50 AM

http://chemmovies.unl.edu/chemistry/smallscale/SS004.html