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Chemical Reactions
Chapter 7 Chemical Reactions
| Question | Answer |
|---|---|
| A ________ ____________ is a representation of a chemical reaction in which the reactants and products are expressed as formulas. | Formula Equation |
| ________ are the substances that enter into a reaction. | Reactants |
| The _______ is the new substance formed as a result of the chemical reaction. | product |
| Write the Law of Conservation of mass | Mass cannot be created nor destroyed. |
| What is the coefficient? | full-sized number located in the front of the molecule |
| Identify the coefficient in this example: 2Na₂SO₄ | 2 |
| Identify the coefficient in this example: 5HCl | 5 |
| Count atoms for this example: MgBr₂ | Mg- 1 Br- 2 |
| Count the atoms for this example: Cu(NO₃)₂ | Cu- 1 N- 2 O- 6 |
| Define chemical energy | energy that is stored in chemicals |
| Explain what is happening during a chemical reaction | A system of chemical changes that involve breaking and reforming of bonds to create a new substance |
| Reaction that occurs when energy is absorbed from surrounding in the form of heat | Endothermic |
| Reaction where energy is released from the system into the surroundings | Exothermic |
| List 5 things that can affect the reaction rate of a chemical | Concentration Temperature Phase and Surface area Solvent Catalyst |
| A substance that participates in a chemical reaction and increases the reaction rate without undergoing a net chemical change itself | Catalyst |
| Identify and balance the following reaction: HgO ➡ Hg + O₂ | Decomposition 2HgO ➡ 2Hg + O₂ |
| Identify and balance the following reaction: KClO₃ → KCl + O₂ | Decomposition 2KClO₃ → 2KCl + 3O₂ |
| Identify and balance the following reaction: C + H₂ → CH₄ | Synthesis C + 2H₂ → CH₄ |
| Identify and balance the following reaction: CuCl₂+ H₂S → CuS + HCl | Double Replacement CuCl₂+ H₂S → CuS + 2HCl |
| Identify and balance the following reaction: PbO + C -→ Pb + CO₂ | Single Replacement 2PbO + C -→ 2Pb + CO₂ |
| Identify and balance the following reaction: Na₂O + H₂O → NaOH | Synthesis Na₂O + H₂O → 2NaOH |
| Identify and balance the following reaction: CH₄ + O → CO₂ + H₂O | Combustion CH₄ + 4O → CO₂ + 2H₂O |
| Identify and balance the following reaction: Cl₂ + NaBr → NaCl + Br₂ | Single Replacement Cl₂ + 2NaBr → 2NaCl + Br₂ |
| Identify and balance the following reaction: BaCl₂ + Na₂SO₄ → NaCl + BaSO₄ | Double Replacement BaCl₂ + Na₂SO₄ → 2NaCl + BaSO₄ |
| Identify and balance the following reaction: C₆H₁₂O₆ + O₂ → CO₂ + H₂O | Combustion C₆H₁₂O₆ + O₂ → 6CO₂ + 6H₂O |
| Convert from word to a formula equation and balance: C₁₀H₈ burns in the presence of oxygen (diatomic) and produces carbon dioxide and water. | C₁₀H₈ + 12O₂ ➡ 10CO₂ + 4H₂O |
| Convert from word to a formula equation and balance: Lithium and chlorine react to form lithium chloride | 2Li + Cl ➡ Li₂Cl |
| Convert from word to a formula equation and balance: hydrogen peroxide (H₂O₂) breaks down to form water and diatomic oxygen. | H₂O₂ ➡ 2H₂O + O₂ |
| Convert from word to a formula equation and balance: zinc reacts with hydrochloric acid (HCl) to produce zinc chloride and diatomic hydrogen | 2Zn + 2HCl ➡ 2ZnCl + H₂ |
Created by:
aemiller
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