30 of 4030 of 40 Items
35:36
Skip to resources
Question
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?
Responses
A physical - baking soda dissolvedphysical - baking soda dissolved
B chemical - gas producedchemical - gas produced
C physical - water bottle got hotphysical - water bottle got hot
D chemical - baking soda disappeared
B chemical - gas produced. This is because a new substance (gas) was produced as a result of a chemical reaction between the vinegar and baking soda.
B) chemical - gas produced
This is a chemical reaction because the baking soda and vinegar react to produce carbon dioxide gas, which fills the balloon. This is evidenced by the expansion of the balloon and the production of gas.
To determine whether the reaction between the baking soda and vinegar is a physical or chemical reaction, we need to consider the following:
1. A physical reaction involves a change in physical properties, such as shape, size, or state of matter, without the formation of any new substances.
2. A chemical reaction involves the formation of new substances with different chemical properties.
In this experiment, when the baking soda comes into contact with the vinegar, it reacts to produce carbon dioxide gas, water, and a salt. The gas produced causes the balloon to inflate, indicating that a new substance is being formed. Therefore, the reaction between baking soda and vinegar is a chemical reaction.
The correct answer is B - chemical - gas produced.
Explanation of how to get the answer:
To determine if the reaction is physical or chemical, you need to understand the difference between the two types of reactions. A physical reaction involves a change in physical properties without producing new substances, while a chemical reaction involves the formation of new substances.
In this case, when baking soda reacts with vinegar, it produces carbon dioxide gas, water, and a salt. The gas causes the balloon to inflate, indicating the formation of a new substance. Therefore, the reaction is chemical.
To arrive at the correct answer, you need to carefully read and understand the information provided in the question as well as have a basic understanding of physical and chemical reactions.