do now: what is a chemical reaction? what is a reactant? what is a product? why do substances...

Do Now:Do Now:

What is a chemical reaction? What is a chemical reaction? What is a reactant? What is a reactant? What is a product? What is a product? Why do substances react Why do substances react with each other?with each other?

EquationEquation

““Sentence” that represents a Sentence” that represents a chemical reactionchemical reaction

Reactants ProductsReactants Products

Word Equation:Word Equation:

Magnesium metal reacts with nitrogen gas to produce solid

magnesium nitride

Magnesium + Nitrogen Magnesium nitride

Plus “+” separate substances on each side

Yield “” separates reactants from products

Chemical Equation:Chemical Equation:


magnesium nitride


Mg(s) + N2(g) Mg3N2(s)

BalancedBalanced Chemical Equation: Chemical Equation:


magnesium nitride


Mg(s) + N2(g) Mg3N2(s)

Must satisfy the law of conservation of matter!!!

3

Balance equations to satisfy the Balance equations to satisfy the Law of Conservation of MatterLaw of Conservation of Matter

Use coefficients to balance Use coefficients to balance equationsequations

Indicate phases (s – l – g – aq)Indicate phases (s – l – g – aq)

Use your ion sheet to write formulas for the following Use your ion sheet to write formulas for the following compounds. Then balance each chemical equations compounds. Then balance each chemical equations

using coefficients. using coefficients.

1.1. Solid Iron (III) chloride reacts with Solid Iron (III) chloride reacts with aqueous sodium hydroxide to form solid aqueous sodium hydroxide to form solid iron (III) hydroxide and aqueous sodium iron (III) hydroxide and aqueous sodium chloridechloride

2.2. Solid Iron (III) oxide reacts with hydrogen Solid Iron (III) oxide reacts with hydrogen gas to produce solid iron and liquid gas to produce solid iron and liquid waterwater

3.3. Sodium bicarbonate, is heated to Sodium bicarbonate, is heated to produce sodium carbonate, carbon produce sodium carbonate, carbon dioxide, and water. dioxide, and water.

Yesterday we looked at the following reactions:Yesterday we looked at the following reactions:

3Mg3Mg(s)(s) + N + N2(g) 2(g) Mg Mg33NN2(s)2(s)

FeClFeCl3(s) 3(s) ++ 3NaOH3NaOH(aq) (aq) Fe(OH)Fe(OH)3(s) 3(s) + 3NaCl+ 3NaCl(aq)(aq)

FeFe22OO3(s) 3(s) +3 H+3 H2(g)2(g) 2Fe2Fe(s)(s) +3H +3H22OO(l)(l)

2NaHCO2NaHCO3(s)3(s) NaNa22CO CO 3(s) 3(s) + CO+ CO2(g)2(g) + H + H22OO(l)(l)

What is happening in each reaction?

5 Basic types of chemical reactions5 Basic types of chemical reactionsCombinationCombination

DecompositionDecomposition

Single-Replacement -Single-Replacement -

Double-Replacement -Double-Replacement -

Combustion- Combustion-

- Reactants combine to form 1 product

- 1 Reactant produces 2 or more products

A +BC -> B + AC

AB +CD -> AD + CB

CxHy + O2 -> CO2 + H2O

Write a balanced chemical equation Write a balanced chemical equation for …for …

Copper metal is dropped into a Copper metal is dropped into a solution of silver nitratesolution of silver nitrate

•Single Replacement – AB + C CB + A (C is a metal)

AB + C AC + B (C is a nonmetal)


Lead II nitrate and sodium iodide Lead II nitrate and sodium iodide

•Double Replacement – AB + CD AD + CB

•A change must take place, such as precipitation, formation of pure liquid, or evolution of gas


The combustion of propane, CThe combustion of propane, C33HH8 8

(oxygen is required!) (oxygen is required!)

•Combustion – hydrocarbon + O2 CO2 + H2O

•hydrocarbon – a molecular compound containing C and H and possibly O

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