12 Questions
Which observation can help determine a chemical reaction?
Evolution of a gas
In a physical change, what typically occurs?
Change in state but no new substance is formed
What is an example of a chemical change?
Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
Which factor is NOT indicative of a chemical reaction?
Change in volume
What is the main difference between chemical and physical changes?
Formation of new substances
Which type of change involves bonds being made or broken between atoms?
Chemical change
What does a word equation help identify in a chemical reaction?
Reactants and products
What does the symbol '(l)' represent in a chemical equation?
Liquids
Which law states that no atoms can be created or destroyed in a chemical reaction?
Law of Conservation of Mass
What is the purpose of balancing a chemical equation?
To ensure the law of conservation of mass is followed
What is the shortcut technique for balancing a chemical equation mentioned in the text?
Simultaneous equations method
In the chemical equation: aCaCO3 + bH3PO4 → cCa3(PO4)2 + dH2CO3, what are the values of a, b, c, and d when c=1?
a=3, b=2, c=1, d=3
Learn about physical and chemical changes in chemical reactions and equations. Understand how new substances with new properties form in chemical changes, while in physical changes, only the state or color of the substance changes without forming new substances.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
