Chemo

• What is the purpose of chemical equations?

  To show chemical reactions
• What does balancing equations ensure in a chemical reaction?

  Conservation of matter
• What is the formula for magnesium oxide?

  MgO
• What type of reaction is represented by the equation 2H₂ + O₂ → 2H₂O?

  Combination reaction
• What happens in a decomposition reaction?

  A single reactant breaks up
• What is a characteristic of displacement reactions?

  More reactive elements replace others
• What is the general form of a double displacement reaction?

  Exchange of ions between reactants
• What does reduction involve in a chemical reaction?

  Gain of hydrogen or loss of oxygen
• What does oxidation involve in a chemical reaction?

  Gain of oxygen or loss of hydrogen
• What is the chemical formula for copper(II) oxide?

  CuO
• How do reduction and oxidation relate to each other in redox reactions?

  They occur simultaneously; one gains, one loses
• If you have the reaction 2Na + Cl₂ → 2NaCl, what type of reaction is this?

  Combination reaction
• In the reaction 2H₂ + O₂ → 2H₂O, what are the products formed?

  Water (H₂O)
• What is the result of a chemical reaction?

  Formation of products
• Why is it important to balance chemical equations?

  To ensure equal number of atoms
• What distinguishes a combination reaction from a decomposition reaction?

  Combination forms one product; decomposition breaks down
• In a double displacement reaction, what happens to the ions?

  They exchange places between compounds
• What is the chemical equation for the oxidation of copper?

  Cu + O₂ → CuO
• What is the significance of the law of conservation of matter in chemical reactions?

  Mass is neither created nor destroyed
• How does the reactivity of elements affect displacement reactions?

  More reactive elements replace less reactive ones
• If a reaction involves the loss of hydrogen, what type of reaction is it likely undergoing?

  Oxidation reaction
• What is the product of the reaction NaCl + H₂O?

  NaCl and H₂O remain unchanged
• What does the term 'redox' refer to in chemistry?

  Reduction and oxidation reactions
• How can you identify a redox reaction?

  By observing changes in oxidation states
• In the reaction 2H₂ + O₂ → 2H₂O, what is the role of oxygen?

  It acts as an oxidizing agent
• What is the chemical formula for water?

  H₂O
• What is the main characteristic of a combination reaction?

  Two or more substances combine
• How does the concept of conservation of mass apply to chemical equations?

  Atoms are conserved in reactions
• If a chemical reaction produces water and sodium chloride, what type of reaction is it?

  Double displacement reaction
• What is the general outcome of a chemical reaction?

  Formation of new substances
• What does it mean for a reaction to be classified as redox?

  It involves both reduction and oxidation
• How can you tell if a reaction is a displacement reaction?

  By observing the replacement of elements
• In a reaction where copper is oxidized, what happens to its oxidation state?

  It increases
• What is the chemical formula for sodium chloride?

  NaCl