what is observeed when carbon dioxide was bubbled into bromothymol blue?
a. the color of the solution changed from greenish to yellow color.
b. the solution turned cloudy
c. the color of the solution changed from yellow to colorless
d. a precipitate formed
again I say the answer is a. but the color wasn't really greenish it was a more blue color to start then turned yellow is this what i should have observed?
When CO2 is bubbled into water, a weakish acid (H2CO3) is formed. Water itself is normally neutral, and adding bromothymol blue makes the acid slightly acid. If the water pH was alkaline, the initial color would have been blue, and turned to yellow as CO2 is bubbled.
See the bromo chart and pH.
http://antoine.frostburg.edu/chem/senese/101/acidbase/indicators.shtml
so then the best answer is a like I suspected.. but you agree it would have been bluish and then turning yellow not so much greenish?
Yes, you are correct. The correct answer would be (a) the color of the solution changed from blue to yellow. Bromothymol blue is an indicator that is blue in basic solutions and turns yellow in the presence of acidic conditions, such as when carbon dioxide (CO2) is dissolved in water. So, when carbon dioxide is bubbled into a bromothymol blue solution, it will cause the solution to change from blue to yellow.
Yes, you are correct. When carbon dioxide (CO2) is bubbled into bromothymol blue, the observed color change is from a blue-green color to yellow. The change in color indicates a change in pH.
Bromothymol blue is a pH indicator that changes color depending on the pH of the solution. It is blue at a basic pH, green at a neutral pH, and yellow at an acidic pH. When carbon dioxide is bubbled into bromothymol blue, it forms carbonic acid (H2CO3) in water, which increases the acidity of the solution and causes the color to change to yellow.
Therefore, the correct answer is indeed option a. "the color of the solution changed from greenish to yellow color." However, it is important to note that different sources may describe the initial color as greenish or blue-green.
It's great that you paid attention to the specific color change you observed, as it may vary depending on the exact concentration of bromothymol blue and the amount of carbon dioxide introduced.