Stoichiometry notes containing everything you need to know about chemical calculations for grade 10 to matric. these notes give step by step instructions on how to do all the types of calculations that you can be tested on. You will find the following sections in these notes; definitions, symbols s...
Stoichiometry - Flashcards (definitions and steps)
Flashcards17 Flashcards
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Flashcards17 Flashcards
$2.821 sales
Some examples from this set of practice questions
1.
Define a mole.
Answer: A mole is the amount of substance that contains the same number of particles as 12g of the most common isotope of Carbon 12
(the SI unit for amount of substance)
2.
How many particles does one mole contain?
Answer: One mole contains Avogadro\'s number of particles (NA = 6,02 × 10^23 mol^−1)
3.
Define molar mass.
Answer: The mass in grams of one mole of that substance
4.
Define solution
Answer: a homogenous mixture of solute and solvent
5.
Define solute
Answer: The substance that is dissolved in the solution
6.
Define solvent
Answer: the substance in which another substance is dissolved, forming a solution
7.
Define concentration
Answer: the amount of solute per unit volume of solution
8.
Define yield
Answer: a measure of the extent of a reaction, generally measured by comparing the amount of product against the amount of product that is possible
9.
What are the steps for solving problems involving equations?
Answer: 1) Write a balanced chemical equation for the reaction
2) Convert any given masses or volumes to moles
3) Use the mole ratio from the chemical equation to convert from moles of one substance to moles of another substance
4) Convert from moles back to masses or volumes
Content preview
Intro
Mole a mole defined as the amount of
is
the substance that contains the same
number of particles as 12g of the most
common isotope of Carbon 12 I
I mole 6,02 1023 particles
Avogadro's number Wa
Molar Massa is the mass in
grams
of one
mole of a substance and
it has 6,02 1023 Units
M Mass in
n Number grams
of moles
M Molar mass From periodic table
V Volume in decimeters cubed
c Concentration in mob dm 3
N Number of particles latomslmoleculeslions
Na Avogadro's Number 6,02 1023
Vm Molar Volume 22,4dm at STPCoor273151101.3kPa
, Basic Stoichiometry
Mass m n'IF m nM Masson
Volume 4 n Y MoleRatio nvm Volumel
Use for m
for Useforgass
gasses
Molecules
Concentration c n cu or c Fi Concentration
Use for solutions Reactions Use for solution
Number of n N N nNA Number
particles CN NA of particles
Problems
involving equations
1 Write a balanced chemical equation
for the reaction
2 Convert masses or volumes
given
to molesany
3 Use the mole ratio from the chemical
equation to convert from moles of one
substance to moles of another substance
4 Convert from moles back to masses
or volumes
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