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Chemical Reactions Overview

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Questions and Answers

What is the difference between the gypsum and Paris?

Gypsum is a naturally occurring mineral, while Paris is a synthetic compound. (correct)

Gypsum is used in construction, while Paris is used in art.

They have different chemical formulas. Gypsum has the formula CaSO⁄2H⁄2O, while Paris has the formula CaSO4. 

Gypsum is a chemical compound, while Paris is a mixture of other chemicals.

How can you make a Plaster of Paris?

Plaster of Paris is produced when Gypsum is heated to a temperature of 150 degrees Celcius and then powdered.

What is the chemical formula for Plaster of Paris?

CaSO4.1/2H2O

Study Notes

Chemical Reactions

Chemical reactions involve the rearrangement of atoms to form new substances.
Reactants are the substances that undergo change.
Products are the new substances formed.
Chemical equations represent reactions, with reactants on the left and products on the right, separated by an arrow.
The Law of Conservation of Mass applies, meaning the number of atoms of each element is the same on both sides of the equation. This is balanced.

Examples of Chemical Reactions

Calcium hydroxide (Ca(OH)₂) reacts with carbon dioxide (CO₂) to produce calcium carbonate (CaCO₃) and water (H₂O). Ca(OH)₂ + CO₂ → CaCO₃ + H₂O
Calcium sulfate dihydrate (CaSO₄·2H₂O) is a chemical compound.

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Description

Explore the fundamentals of chemical reactions, including the rearrangement of atoms and the distinction between reactants and products. This quiz covers the representation of chemical equations and the Law of Conservation of Mass, with practical examples to illustrate these concepts.