Ms. Crawford gave the following instructions to her science class: • Place an empty water bottle on the table and remove the lid. Carefully pour 10 ml of vinegar into the bottle. • Open up the mouth of the balloon and have you lab partner spoon 1 teaspoon of baking soda into the balloon. • Without spilling any of the baking soda, stretch the mouth of the balloon over the mouth of the bottle. • Turn the balloon completely upright so that the baking soda inside the balloon pours into the bottle with the vinegar. Watch! The baking soda looked like it dissolved in the vinegar. Sarah and Connor watched as the balloon expanded and filled with a gas.
Was this a physical or chemical reaction and why?
A) chemical - gas produced
B) physical - water bottle got hot
C) physical - baking soda dissolved
D) chemical - baking soda disappeared
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