Chemical Reactions And Equations Flashcards
It Burns with a white dazzling flame and changes into a white powder
Magnesium when reacting with oxygen in the air
Determines if a chemical reaction has taken place
change in state
change in colour
evolution of a gas
change in temperature
2Mg + O2
2Mgo
The left side of the equation
Reactants
The right side of the equation
Products
Arrow
The direction of the reaction
short representation of a reaction
a chemical equation
Zn + H2So4
ZnSo4 + H2
an unbalanced equation is also known as
a skeletal equation
Fe + H2O
Fe3O4 + H2
mass of reactants should equal to the mass of products
law of conservation of mass
Method of balancing chemical equations while making trials to balance the equation by using the smallest whole number coefficient
Hit and Trial Method
solid present as a solution in water
Aqueous solution
CaO
Quick Lime
Ca(OH)2
Slaked Lime
solution of calcium hydroxide
used for whitewashing walls
two or more reactants react to give one product
Combination reaction
a reaction where heat is released along with products
Exothermic reaction
a reaction where one reactant decomposes to form two or more products
Decomposition reaction
When a decomposition reaction is carried out by heating
Thermal Decomposition reaction
When light energy like sunlight is used to decompose a reactant
Photolytic Decomposition reaction
When electricity is used for the decomposition reaction
Electrolytic Decomposition reaction
ferrous sulphate decomposes to
ferric oxide, sulphur dioxide and sulphur trioxide
Use of calcium oxide
manufacture cement
Nitrogen dioxide
brown fumes
white silver chloride turns
grey under sunlight
a reaction where energy is absorbed
endothermic reaction
the reactions of silver chloride and silver bromide with sunlight are used in
black and white photography
iron nail dipped in copper sulphate solution becomes
brownish in color
the blue colour of copper sulphate solution fades away
when iron nails are dipped in copper sulfate solution
When a higher reactive metal displaces a lesser reactive metal from its solution then it is known as
A displacement reaction
insoluble substance formed
precipitate
precipitate reaction
any reaction that produces a precipitate
reactions where there is an exchange of ions between the reactants
double displacement reaction
oxygen is added to copper
a layer of black substance is formed called copper oxide
hydrogen gas passed through heated CuO
the reverse reaction takes place and the black coating turns brown again
if a substance gains oxygen during a reaction
oxidized substance
if a substance loses oxygen during a reaction
reduced substance
a reaction where one reactant gets oxidized while the other gets reduced
redox reaction
the substance getting oxidized is
a reducing agent
the substance getting reduced is
an oxidizing agent
oxidized reaction
addition of oxygen or loss of hydrogen
reduced reaction
addition of hydrogen or loss of oxygen
shiny iron particles get coated with reddish-brown powder
rusting of iron
when metal is attacked by other substances in its surroundings like moisture, acids, etc
the process is known to be corrosion
when fats and oils are oxidized
they become rancid
rancid substances
change their taste and smell
substances that prevent oxidation
antioxidants
ways to slow down oxidation
keeping food in airtight containers
chips manufacturer flush chips bags
with nitrogen in order to prevent them from getting oxidized
