Unit 5 Test Review

What is the Law of Conservation of Mass? In any reaction mass is conserved Mass of reactants = mass of products

Describe fusion 2 or more nuclei combine to form a larger nuclei

Describe fission nuclei split into fragments when struck by neutrons

The reactants and products of complete combustion of a hydrocarbon CxHx would include H2O CO2 O2

The reactants and products of a decomposition reaction would include A single reactant that is an ionic or molecular compoound Have multiple products

What type of reaction occurs when magnesium reacts with aluminum chloride? Single replacement

The reactants and products of a synthesis reaction would include Multiple reactants and a single product

The reactants and products of a single replacement reaction would include A single element and a compound

What will happen to the rate of reaction if you increase the concentration of the reactants? It will increase

What will happen to the rate of reaction if you increase the temperature? The rate will increase

What is activation energy? The amount of energy needed for a reaction to occur

What is a catalyst? A substance that when added to a reaction, will increase the rate of the reaction without being used up

What are enzymes? Proteins in the body that act as catalysts for biological processes

What is a limiting reactant? When there are more than 1 reactants - the one that gets used up first and limits that amount of product possible

Identify the parts of a reaction Coefficient Reactant Separates reactants or products seperates reactants from products Tells the state of the substance product

What is an endothermic reaction? A reaction in which energy is absorbed

What is an exothermic reaction? A reaction in which energy is released

Identify the following reaction as: synthesis, decomposition, single-displacement, double displacement, or combustion NaNO3 (s)  NaNO2 (s) + O2 (g) decomposition

Identify the following reaction as: synthesis, decomposition, single-displacement, double displacement, or combustion FeS (s) + HCl (aq)  FeCl2 (aq) + H2S (g) double displacement

Identify the following reaction as: synthesis, decomposition, single-displacement, double displacement, or combustion CO (g) + O2 (g)  CO2 (g) + H2O (g) combustion

Identify the following reaction as: synthesis, decomposition, single-displacement, double displacement, or combustion Al (s) + S (s)  Al2S3 (s) synthesis

Identify the following reaction as: synthesis, decomposition, single-displacement, double displacement, or combustion KI (aq) + Cl2 (g)  KCl (aq) +I2 (aq) single displacement

Write a balanced chemical equation for the following reaction sodium metal will combine with oxygen in dry air to form solid sodium oxide 4Na (s) + O2 (g)  2Na2O (s)

Balance the following equation AlCl3 (aq) + NaOH (aq)  NaCl3 (aq) + AlOH (s)

2Ca (s) + 2H2O (l)  2CaOH2 (aq) Balance the following equation Ca (s) + 2H2O (l)  CaOH2 (aq) 2Ca (s) + 2H2O (l)  2CaOH2 (aq)

What are the reactants in a double replacement reaction? 2 ionic compounds

In the equation 2K (s) + 2H2O (l)  2KOH (aq) + H2 (g), what is the physical state of each reactant and product? reactants products K – solid KOH – aqueous solution H2O – liquid H2 - gas

Write a balanced chemical equation for the following reaction aluminum metal + hydrochloric acid aluminum chloride solution + hydrogen 2Al + 6HCl 2AlCl3 + 3H2

Chem I - done Chem I honors continue

Determine the oxidation numbers of all elements of the following substances Al = 0

Determine the oxidation numbers of all elements of the following substances Ca2+ = +2

Determine the oxidation numbers of all elements of the following substances PO42-

Determine the oxidation numbers of all elements of the following substances C2H6O

For the following redox reaction determine the element that is oxidized, reduced, the oxidizing agent, and the reducing agent H2C2O4 + K2MnO4  CO2 + K2O + Mn2O3 + H2O C - +3  +4 = lose 1 e- = oxidized, reducing agent Mn +6  +3 = gain 3 e- = reduced, oxidizing agent