Flashcards in Reactions Test Deck (35)
Example of chemical reaction
Burn a piece of paper, you can't get the piece of paper back
What are reactants?
The original substances in a reaction
What are products
The new substances formed in a reaction
What's an indication that new substance is produced
What's a chemical equation?
A symbolic description of a chemical reaction
What are chemical formulas
Represent reactants and products
What are examples of chemical formulas
Polyatomic ions, hydrogen H2, oxygen O2, H2O water
What does the plus sign do in a chemical formula
Separates multiple reactants or multiple products
What is the arrow in a chemical formula
Separates reactants from products, splits equation in two halves
Yields or produces
H2+O2->H2O is an example of
Chemical equation with chemical formulas
What do state of matter symbols do
Indicate if a substance exists as a solid, liquid, gas, aqueous, or precipitiate
What are the state of matter symbols (Solid, liquid, gas, aqueous, precipitate)
S, l, g, aq, ppt
What does aqueous and precipitate mean
Dissolved in water (aqueous)
Solid formed in chemical reaction (precipitate)
What's the memory trick for diatomic molecules
What are coefficients
Represent the relative amounts of reactants and products
Represent the number of molecules or moles of a substance
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
Know how to...
In terms of energy content, what are the two kinds of reactions
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
Know how to draw
Exothermic reaction charts
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
Know how to draw...
Endothermic reaction charts
What's a synthesis reaction
Combine multiple substances to produce single, more complex, product
What's a decomposition reaction
The breakdown of a single compound to produce two or more simpler substances
What's a single displacement reaction
Reaction in which a single element reacts with a compound , active elements replace less active elements
What's a double displacement reaction
2 elements switch partners
Occurs in ionic compounds
Reactions in which 2 elements in different compounds exchange places
The reaction of a compound with O2 to form oxides and water
Compound containing oxygen
Know examples of...
Synthesis, decomposition, single displacement, double displacement, and combustion reactions
Know how to write and balance
All the types of equations studied (synthesis, decomposition, single displacement, double displacement, combustion)
What is a chemical reaction?
A chemical change in which substances react to form new substances with new properties