Flashcards in Reactions Test Deck (35)
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1
Example of chemical reaction
Burn a piece of paper, you can't get the piece of paper back
2
What are reactants?
The original substances in a reaction
3
What are products
The new substances formed in a reaction
4
What's an indication that new substance is produced
Color change
5
What's a chemical equation?
A symbolic description of a chemical reaction
6
What are chemical formulas
Represent reactants and products
7
What are examples of chemical formulas
Polyatomic ions, hydrogen H2, oxygen O2, H2O water
8
What does the plus sign do in a chemical formula
Separates multiple reactants or multiple products
9
What is the arrow in a chemical formula
Separates reactants from products, splits equation in two halves
Yields or produces
10
H2+O2->H2O is an example of
Chemical equation with chemical formulas
11
What do state of matter symbols do
Indicate if a substance exists as a solid, liquid, gas, aqueous, or precipitiate
12
What are the state of matter symbols (Solid, liquid, gas, aqueous, precipitate)
S, l, g, aq, ppt
13
What does aqueous and precipitate mean
Dissolved in water (aqueous)
Solid formed in chemical reaction (precipitate)
14
What's the memory trick for diatomic molecules
HON-7
15
What are coefficients
Represent the relative amounts of reactants and products
Represent the number of molecules or moles of a substance
16
What's the law of conservation of mass
Mass is neither created nor destroyed in normal chemical reactions
(Reworded) the total mass of reactants equals the total mass of the products equals the same number of atoms
BALANCED EQUATIONS FOLLOW THIS RULE
17
Know how to...
Balance equations
18
In terms of energy content, what are the two kinds of reactions
Exothermic, endothermic
19
What's an exothermic reaction?
A reaction in which energy is released to the surroundings , the temperature of surroundings increases (gets hotter), the energy content of products is less than energy content of the reactants
20
Know how to draw
Exothermic reaction charts
21
What's an endothermic reaction?
A reaction in which energy is absorbed from the surroundings , the temperature of the surroundings decreases, the energy content of products is greater than the energy content of the reactants
22
Know how to draw...
Endothermic reaction charts
23
What's a synthesis reaction
Combine
Combine multiple substances to produce single, more complex, product
24
What's a decomposition reaction
The breakdown of a single compound to produce two or more simpler substances
1 reactant
25
What's a single displacement reaction
Reaction in which a single element reacts with a compound , active elements replace less active elements
26
What's a double displacement reaction
2 elements switch partners
Occurs in ionic compounds
Reactions in which 2 elements in different compounds exchange places
27
Combustion reaction
The reaction of a compound with O2 to form oxides and water
28
Oxide
Compound containing oxygen
29
Know examples of...
Synthesis, decomposition, single displacement, double displacement, and combustion reactions
30
Know how to write and balance
All the types of equations studied (synthesis, decomposition, single displacement, double displacement, combustion)
31
What is a chemical reaction?
A chemical change in which substances react to form new substances with new properties
32
Know...
Polyatomic ions
33
Silver is
Ag+1
34
Zinc is...
Zn+2
35
