7. Chemical Reactions. Chemical Reactions How many atoms of each element are found in Na 2 SO 4 ?

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Presentation transcript:

7. Chemical Reactions

Chemical Reactions How many atoms of each element are found in Na 2 SO 4 ?

Chemical Reactions How many atoms of each element are found in Na 2 SO 4 ? Na= 2 S = 1 O = 4

Chemical Reactions How many atoms of each element are found in Ba(OH) 2 ?

Chemical Reactions How many atoms of each element are found in Ba(OH) 2 ? Ba = 2 O = 2 H = 2

Chemical Reactions How many atoms of each element are found in (NH 4 ) 3 PO 4

Chemical Reactions How many atoms of each element are found in (NH 4 ) 3 PO 4 N = 3 H= 12 P = 1 O = 4

Chemical Reactions In a chemical reaction the substances on the left of the  are called ____________ and the substances on the right are called __________.

Chemical Reactions In a chemical reaction the substances on the left of the  are called reactants and the substances on the right are called products.

Chemical Reactions In chemical reactions ________ speed up a reaction and _________ slow down a reaction.

Chemical Reactions In chemical reactions catalysts speed up a reaction and inhibitors slow down a reaction.

Chemical Reactions In a combustion reaction, oxygen (O 2 ) reacts with another substance to produce _____ and ______.

Chemical Reactions In a combustion reaction, oxygen (O 2 ) reacts with another substance to produce carbon dioxide (CO 2 ) and water (H 2 O)

Chemical Reactions In a combustion reaction, oxygen (O 2 ) reacts with another substance to produce carbon dioxide (CO 2 ) and water (H 2 O)

Chemical Reactions Balance the following reaction: AlBr 3 + K  KBr + Al

Chemical Reactions Balance the following reaction: AlBr 3 + 3K  3KBr + Al

Chemical Reactions What type of reaction is this? AlBr 3 + 3K  3KBr + Al

Chemical Reactions What type of reaction is this? Al is displaced and Br binds to potassium: Single displacement AlBr 3 + 3K  3KBr + Al

Chemical Reactions Balance the following reaction: CH 4 + O 2  CO 2 + H 2 O

Chemical Reactions Balance the following reaction: CH 4 + 2O 2  CO 2 + 2H 2 O

Chemical Reactions What type of reaction is the following reaction? CH 4 + 2O 2  CO 2 + 2H 2 O

Chemical Reactions What type of reaction is the following reaction? Oxygen gas reacts to produce carbon dioxide and water: combustion. CH 4 + 2O 2  CO 2 + 2H 2 O

Chemical Reactions What type of reaction is the following reaction? Bi + F 2  BiF 3

Chemical Reactions What type of reaction is the following reaction? Two substances form ONE, more complex substance. synthesis Bi + F 2  BiF 3

Chemical Reactions Balance the following reaction. Bi + F 2  BiF 3

Chemical Reactions Balance the following reaction. 2Bi + 3F 2  2BiF 3

Chemical Reactions Balance the following reaction. Al 2 O 3  Al + O 2

Chemical Reactions Balance the following reaction. 2Al 2 O 3  4Al + 3O 2

Chemical Reactions What type of reaction is this? 2Al 2 O 3  4Al + 3O 2

Chemical Reactions What type of reaction is this? A compound breaks down into two simpler compounds; decomposition 2Al 2 O 3  4Al + 3O 2

Chemical Reactions What type of reaction is this? A compound breaks down into two simpler compounds; decomposition 2Al 2 O 3  4Al + 3O 2

Chemical Reactions What type of reaction is this? FeO + PdF 2  FeF 2 + PdO

Chemical Reactions What type of reaction is this? Ions switch places. Double displacement FeO + PdF 2  FeF 2 + PdO

Chemical Reactions Balance the reaction? FeO + PdF 2  FeF 2 + PdO

Chemical Reactions Balance the reaction? FeO + PdF 2  FeF 2 + PdO It IS balanced

Chemical Reactions When there is a net release of energy during a chemical reaction (usually in the form of heat) it is __________, but if energy is absorbed and the temperature decreases it is ________.

Chemical Reactions When there is a net release of energy during a chemical reaction (usually in the form of heat) it is exothermic, but if energy is absorbed and the temperature decreases it is endothermic.

Chemical Reactions _____ ______ is the minimum amount of energy needed to start a chemical reaction.

Chemical Reactions Activation energy is the minimum amount of energy needed to start a chemical reaction.

Chemical Reactions Which of the following is NOT true of a mole? a. contains 6.02 x particles of a substance b. atomic number of an element is equal to its molar mass. c. is represented by Avogadro’s number d. mole ratios cannot be determined in a chemical reaction

Chemical Reactions Which of the following is NOT true of a mole? a. contains 6.02 x particles of a substance b. atomic number of an element is equal to its molar mass. c. is represented by Avogadro’s number d. mole ratios cannot be determined in a chemical reaction

Chemical Reactions What is the molar mass of one mole of Argon?

Chemical Reactions What is the molar mass of one mole of Argon? Find argon (Ar) on the periodic table. The atomic mass equals one molar mass = 40 g/mol

Chemical Reactions What is the mass of 2 moles of carbon?

Chemical Reactions What is the mass of 2 moles of carbon? Find carbon (C) on the periodic table. The atomic mass equals one molar mass = 12 g/mol 2 mol C x 12 g C / 1 mol C = 24 g C

Chemical Reactions What is the mass of 1 mole of sodium chloride (NaCl)?

Chemical Reactions What is the mass of 1 mole of sodium chloride (NaCl)? ElementAtoms of element Molar massTotal mass for element Na1X23= Cl1X35= Sum of masses58 g/mol NaCl

Chemical Reactions What is the mass of 1 mole of sodium chloride (CaCO 3 )?

Chemical Reactions What is the mass of 1 mole of sodium chloride (CaCO 3 )? ElementAtoms of element Molar massTotal mass for element Ca1X40= C1X12= O3x16=48 Sum of masses100 g/mol CaCO 3