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Questions and Answers
What observation is made when magnesium ribbon is burned?
What observation is made when magnesium ribbon is burned?
Magnesium ribbon burns with a dazzling white flame and changes into a white powder known as magnesium oxide.
What are indicators of a chemical reaction having taken place? (Select all that apply)
What are indicators of a chemical reaction having taken place? (Select all that apply)
A chemical reaction results in a change in the identity of the initial substance.
A chemical reaction results in a change in the identity of the initial substance.
True
What is the word-equation for the reaction between magnesium and oxygen?
What is the word-equation for the reaction between magnesium and oxygen?
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What should be done when performing Activity 1.1 with magnesium ribbon?
What should be done when performing Activity 1.1 with magnesium ribbon?
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Study Notes
Chemical Reactions and Equations
- Chemical reactions occur when substances change their identity and nature.
- Examples of everyday chemical reactions include milk spoiling, iron rusting, grapes fermenting, food cooking, digestion, and respiration.
- Key indicators that a chemical reaction has taken place include a change in state, color, gas evolution, and temperature change.
- Chemical reactions can be represented using word equations, which summarize the reaction in sentence form.
- Word equations clearly show the reactants (substances that undergo change) and the products (new substance formed).
Magnesium and Oxygen Reaction
- Burning a magnesium ribbon in air causes it to react with oxygen, forming magnesium oxide.
- The chemical reaction is represented by the following word equation:
Magnesium + Oxygen → Magnesium oxide - The reactants are magnesium and oxygen, while the product is magnesium oxide.
Lead Nitrate and Potassium Iodide Reaction
- When lead nitrate solution is added to potassium iodide solution, a yellow precipitate of lead iodide is formed.
Zinc, Hydrochloric Acid, and Sulphuric Acid Reaction
- When zinc granules are added to hydrochloric acid or sulphuric acid, hydrogen gas is released.
- This reaction is accompanied by an increase in the temperature.
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Description
Explore the fascinating world of chemical reactions through this quiz. You will learn about various types of reactions, indicators of a chemical change, and how to represent these reactions using word equations. Test your knowledge on specific reactions involving magnesium, oxygen, and more!
