why is it important to put the rubber tubing in the bottle all the way to the end then in the mouth of the bottle

so the gas does not bubble through water and dissolve

why was it important to know the size of the gas bubble when the test tube was full of air

so we could compare it to the test tube bubble that was full of baking soda

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Question	Answer
What do you do avoid by removing the rubber tubing from the bottle before capping off the alcohol burner	avoid backwash
why is it important to put the rubber tubing in the bottle all the way to the end then in the mouth of the bottle	so the gas does not bubble through water and dissolve
why was it important to know the size of the gas bubble when the test tube was full of air	so we could compare it to the test tube bubble that was full of baking soda