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Questions and Answers
What is the purpose of adding HCl to Zn granules?
What is the purpose of adding HCl to Zn granules?
What evidence would indicate a chemical change when HCl is added to Zn granules?
What evidence would indicate a chemical change when HCl is added to Zn granules?
What would be the expected observation after adding HCl to Zn granules?
What would be the expected observation after adding HCl to Zn granules?
Study Notes
Adding HCl to Zn Granules
- The purpose of adding HCl to Zn granules is to initiate a single replacement reaction, where hydrogen gas is produced, and zinc chloride is formed.
- Evidence of a chemical change includes the production of hydrogen gas, which can be identified by the presence of bubbles and a popping sound when a flame is applied.
Observations
- When HCl is added to Zn granules, the expected observation is the production of hydrogen gas, which manifests as bubbles forming on the surface of the zinc granules.
- As the reaction progresses, the zinc granules will start to dissolve, and the solution will turn cloudy or opaque due to the formation of zinc chloride.
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Description
This quiz discusses how to prove that a chemical change has occurred when dilute hydrochloric acid is added to zinc granules, with two supporting arguments. It tests your understanding of chemical reactions.
