Chemical Reaction Analysis: Mercury and Hydrochloric Acid
A one-page, single-sided support sheet for 10th graders to complete before a chemical reaction quiz, taking roughly 20-30 minutes. Students classify reactants and products in Hg + 2 HCl → HgCl₂ + H₂, draw particle-level models, count atoms of each element, and explain how conservation of matter and observable changes in physical state show that a reaction has occurred.
“Can you make me a one page single side support sheet for students to complete before a quiz. The chemical reaction in for is Hg (l) + 2 HCl (aq) -> HgCl2 (s) + H2 (g). I want students to identify which molecules are reactants and which molecule are products, I want students to draw a model of the molecules in the equation, I want student to name how many of each atom there is for each molecule, I also want students to explain how their model and atom count supports the Law of Conservation of Matter, and I also want students to explain how they would SEE that a reaction is occurring using the state of matter for each molecule (an example of how would be like: 2 colorless gases combine to form 1 harmless colorless gas and 1 poisonous colorless gas)”
Teacher Guide & Tips
- Use as a pre-quiz review sheet, either independently or in pairs, after students have learned balancing equations and the law of conservation of matter.
- Discussion question: Why does the mass of the reactants equal the mass of the products even though the substances look completely different?
- Scaffold for struggling readers: Provide a periodic table and a sample completed row (for example, counting atoms in H₂O) before students begin the atom inventory.
- Extension for advanced students: Ask them to predict observable signs of reaction, such as gas bubbling or a color change, and justify those predictions using the states of matter listed.
- Estimated time: about 20-30 minutes, including a brief whole-class debrief on the observable evidence of a reaction.
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Try Diffit for free“Can you make me a one page single side support sheet for students to complete before a quiz. The chemical reaction in for is Hg (l) + 2 HCl (aq) -> HgCl2 (s) + H2 (g). I want students to identify which molecules are reactants and which molecule are products, I want students to draw a model of the molecules in the equation, I want student to name how many of each atom there is for each molecule, I also want students to explain how their model and atom count supports the Law of Conservation of Matter, and I also want students to explain how they would SEE that a reaction is occurring using the state of matter for each molecule (an example of how would be like: 2 colorless gases combine to form 1 harmless colorless gas and 1 poisonous colorless gas)”
Teacher Guide & Tips
- Use as a pre-quiz review sheet, either independently or in pairs, after students have learned balancing equations and the law of conservation of matter.
- Discussion question: Why does the mass of the reactants equal the mass of the products even though the substances look completely different?
- Scaffold for struggling readers: Provide a periodic table and a sample completed row (for example, counting atoms in H₂O) before students begin the atom inventory.
- Extension for advanced students: Ask them to predict observable signs of reaction, such as gas bubbling or a color change, and justify those predictions using the states of matter listed.
- Estimated time: about 20-30 minutes, including a brief whole-class debrief on the observable evidence of a reaction.
Chemical Reaction Analysis: Mercury and Hydrochloric Acid
A one-page, single-sided support sheet for 10th graders to complete before a chemical reaction quiz, taking roughly 20-30 minutes. Students classify reactants and products in Hg + 2 HCl → HgCl₂ + H₂, draw particle-level models, count atoms of each element, and explain how conservation of matter and observable changes in physical state show that a reaction has occurred.
What is Diffit?
Teachers use Diffit to get quality materials for their unique classrooms. Adjust difficulty, add scaffolds, or change the topic to get started.
Try Diffit for free