A student wants to compare the amounts of CO2 off by the yeast provided with different amount of sugar. The student places a ballon over each container to catch the released CO2. Which observation is a qualitive observation the student can make?
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A substance, mostly liquid that donates a proton or accepts an electron pair in reactions. An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons.
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