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Chemistry > Chemical Equations & Reactions > Flashcards

Chemical Equations & Reactions Flashcards

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1
Q

The process by which one or more substances change to produce one or more different substances. Different chemical and physical properties.

A

Chemical Change

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2
Q

Are used to write a chemical reaction

A

Chemical Changes

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3
Q

Reactants

A

Products

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4
Q

Mass and atoms are

A

Conserved

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5
Q

Physical Change is not a

A

Chemical Change

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6
Q

Examples of a Physical Change

A

State, Evaporation, Condensation, Melting & Freezing

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7
Q

Representation of a chemical reaction that uses symbols to show relationship between reactants and products.

A

Chemical Equation

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8
Q

Relative amounts of reactants and products

A

Chemical Equation

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9
Q

Just the names of reactants and products, qualitative not quantitative

A

Word Equation

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10
Q

Indicates quantitative amounts of reactants and products, states of each, temperature, pressure and net energy flow.

A

The Balanced Checmical Equation

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11
Q

nitrogen reacts with hydrogen to produce ammonia

A

Example Word Equation

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12
Q

(s)

A

Solid

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13
Q

(l)

A

Liquid

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14
Q

(g)

A

gas

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15
Q

(aq)

A

Aqueous (dissolved in H2O)

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16
Q

<===>

A

Reversable Reaction

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17
Q

<===>

A

Reversable Reaction

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18
Q

Reactions ______ atoms

A

Conserve

19
Q

During reactions, # and kinds of atoms are the same, tey are just rearranged (balanced).

A

Reactions conserve Atoms

20
Q

_____ for chemical formulas are determined by _____ states and cannot be _______

A

Subscripts, oxidation, changed

21
Q

Subscripts for chemical formulas are determined by oxidation states and cannot be changed

A

Balance Equations

22
Q

____ and ____ of atoms have to be equal on both sides of equations

A

and Type

23
Q

and Type of atoms have to be equal on both sides of equations

A

Balance Equations

24
Q

—-> ‘Yield’ sign also means

A

equal

25
Q

Balance equation with __________ (small whole numbers in ________ of cpds) and ________ be changed until the reaction is balanced

A

Coefficients, Front, Can

26
Q

3 Steps to Balance a Chemical Equation

A

1) Identify reactants and products and write a correct formula for each (exidation # and subscripts)
2) Count atoms and insert coefficients to balance
3) Double checks
NOTE: Polyatomic ions that do not break apart can be counted as a single unit

27
Q

Used to help predict products

A

Reaction Types

28
Q

Oxidation reaction of an organic compound, heat is released

A

Combustion Reaction

29
Q

2 or more substances combine to form a new cpd (one product)

A

Synthesis Reaction

30
Q

Opposite of Synthesis reaction

A

Decomposition Reaction

31
Q

Single cpd breaks down to form two or more simpler substances

A

Decomposition Reaction

32
Q

Single element reacts with a cpd and displaces an element from the cpd

A

Single Replacement / Displacement

33
Q

a list of elements that have similar properties and arranged in descending order of chemical activity

A

Activity series

34
Q

Metal or Hydrogen replaces metal, non-metal replaces a non-metal

A

Single Replacement / Displacement

35
Q

A more active element (single element) replaces a less active element (in a cpd)

A

Single Replacement / Displacement

36
Q

Oxidation is the loss of electrons

A

OIL

37
Q

The reduction is the gain of electrons

A

RIG

38
Q

An exchange of ions between two aqueous cpds in which a gas, solid or molecule cpd is formed

A

Double Replacement/Displacement

39
Q

Everything is included

A

Total Ionic Equation

40
Q

Equation that quantitatively represents those atoms, ions or molecules that undergo a chemical change

A

Net Ionic Equation

41
Q

Ions that are present in a solution in which they do not participate in the chemical change

A

Spectator Ions

42
Q

4 Steps for Writing net iconic equations

A

1) Write a balance equation indicating that phase of each product
2) Separate aqueous compounds
3) Remove spectators ions, indicate # of ions or products, state and oxidation #. (use sol, rules to determine ppt)
4) Write net - # and type of atoms must be balanced.

43
Q

The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change

A

1) color chage (drastic)
2) formation of a precipitate
3) formation of a gas
4) odor change (release an odor)
5) temperature change

44
Q

Evidence of a Chemical Change

A

1) Change E: Released as heat, light, product sound, change temperature, and change in electrical E
2) Formation of a new Substance:
a) Formation of a gas
b) Precipitate
3) Change in color (drastic) and release an odor

Chemistry (2 decks)

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