# Which solution is more acidic; cloudy orange or pale orange after using an indicator? watch

1. Hi everyone, if you put thymol blue (an indicator) in two different solutions and one solution goes cloudy orange whereas the other solution goes pale orange which solution would be more acidic and how do you know?
2. There isn't any way to calculate this or anything given the information, you would have to know the colour changes of thymol blue (probably from a given reference chart) such as this:

You can see that thymol blue is orange from around pH 0-3 (ignore the "bromic thymol blue" ) . The terms "cloudy" and "pale" orange are really not very useful since they could be interpereted in many different ways and the indicator is not based on pale/cloudy colours, but presumably in this question "pale" means more yellow, and "cloudy" means more red. This would mean that the "cloudy" one is more acidic, since the red represents a lower pH value, and the pale solution is less acidic.
3. (Original post by lizardlizard)
There isn't any way to calculate this or anything given the information, you would have to know the colour changes of thymol blue (probably from a given reference chart) such as this:

You can see that thymol blue is orange from around pH 0-3 (ignore the "bromic thymol blue". The terms "cloudy" and "pale" orange are really not very useful since they could be interpereted in many different ways and the indicator is not based on pale/cloudy colours, but presumably in this question "pale" means more yellow, and "cloudy" means more red. This would mean that the "cloudy" one is more acidic, since the red represents a lower pH value, and the pale solution is less acidic.
Thank you so much for your detailed answer and the picture, i really appreciate it! I was wondering if it's possible in any way that cloudy could be the less acidic one, because otherwise it wouldnt support my lab results, can that happen?
4. Yeah, the best thing to do would be to compare the actual sample's colour with a chart, but if you don't have the sample or a picture of it anymore then that's obviously going to be difficult. One possibility would be that one sample just had less indicator added to it than the other, so it showed a more pale colour even though it was lower pH.
5. Thank you so much for your help! Much appreicated!
(Original post by lizardlizard)
Yeah, the best thing to do would be to compare the actual sample's colour with a chart, but if you don't have the sample or a picture of it anymore then that's obviously going to be difficult. One possibility would be that one sample just had less indicator added to it than the other, so it showed a more pale colour even though it was lower pH.

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