A student poured 100 mL of water in a bottle and added 40 mL vinegar to it. A balloon was filled with 20 g baking soda and was fixed at the mouth of the bottle. Slowly the shape of the balloon changed, as shown. The student claims that a chemical change happened when the two substances were mixed. Is the claim made by the student correct? *
(a) Yes, as a new substance was formed in the form of a gas.
(b) Yes, as the mass remains the same throughout the experiment.
(c) No, as the formation of bubbles in the mixture shows a physical change.
(d) No, as the change in the shape and size of the balloon shows a physical change.
Answers
Answer:
a) Yes, as a new substance was formed in the form of a gas.
Explanation:
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Yes the claim made by the student is correct. A new substance was formed in the form of a gas. So, option A is a correct.
Baking soda (sodium bicarbonate) and vinegar (acetic acid) react chemically, creating carbon dioxide gas, water, and sodium acetate as byproducts. A neutralisation reaction or an acid-base reaction are other names for this process.
The balloon expands as a result of the gas (carbon dioxide) that is created in the container, which is a sign of a chemical change. No substance is lost or acquired throughout the reaction, hence the system's mass stays constant. The balloon's altered size and shape do not, however, provide adequate proof that a chemical or physical change has taken place. The key indicator of a chemical shift is the creation of a new substance in the form of a gas. Consequently, the student's assertion that the two compounds underwent a chemical change when combined is true.
Hence, the right response is (a), as a new substance in the form of a gas was created.
For similar question on Creation of gas as a byproduct,
https://brainly.in/question/6366571
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