This is a picture of two test tubes full of limewater. A student will use a straw and breath into the left test tube while another student will areate the limewater in the right test tube.
The test tube which was areated did not change color because it stayed neutral however, there were some bubbles. While the other test was not transpearnt anymore instead, the color became white as a result of contact with carbon dioxide from the student.
Both small beakers are full of 25ml of distilled water however, one beaker will be areated using a pipette while a student will breathe into the water in the other beaker for five minutes. After those five minutes one must add one drop of universal indactor to both beakers.
The beaker on the left came in contact with carbon dioxide and it changed color from white to yellow due to the universal indicator however, this proves that it has become more acidic in PH level. While, the beaker on right was areated and it changed color from white to green which proves that it is still neutral
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