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619bd4ef-1202-4a6c-8b3d-2abe56fed9d1, UNITS AND DIMENSIONS & MOLE…
Stoichiometry
Law of Conservation of mass:
States that the mass of substances in a closed system will remain constant, no matter what processes are acting inside the system.
Balancing equation:
1)Count Atoms on Both Sides
2) Balance One Atom at a Time
3)Balance Oxygen Last
4)Verify All Atoms
UNBALANCED EQUATION:
Fe + H20 -->Fe304 + H2
BALANCED EQUATION:
3Fe +4H20 -->Fe304 + 4H2
CONCENTRATION TERMS
MOLARITY(M):
Moles of Solute / LITRE OF SOLUTION
MOLALITY (m):
Moles of Solute / Kg of solvent
NORMALITY(N):
Gram equivalent / Volume of litre in solution
DENSITY AND SPECFIC GRAVITY:
Relative Density or Specific Gravity =
Density of substance/Density of reference substance
UNITS AND DIMENSIONS & MOLE CONCEPT
Dimensions:
Primitive qualities (M, L, T,θ).
Units: SI (kg, m, s),
CGS (g, cm, s),
FPS (lb, ft, s).
Dimensional Formulas:
1)Force(MLT^-2) :
2)Energy(ML^2t^-2)
3)Density(ML^-3)
**UNITS CONVERSIONS
:
STEPS :check:**
1)Find equivalence statement
2)Use conversion factor
3)Multiply and cancel units
Temperature conversions:
T(°F) = 1.80*T(°C) + 32
Mole concept:
A mole is defined as the amount of substance which contains 6.023*10^23(Avogadro’snumber)particles
(atoms, molecules, ions, etc.)
n=m/M.W
IDEAL GAS LAWS
For an ideal gas: pressure % = mole % = volume %
BOYLE'S LAW:
V ∝ 1/P(Constant temperature)
CHARLE"S LAW :
V ∝ T (Constant pressure)
AVG. MOLECULAR WEIGHT:
Mavg=∑(Miyi )
DENSITY:
ρ =PMavg/RT
DALTON'S LAW:
Ptotal = ∑ Ppartial
AMAGAT'S LAW:
Vtotal =∑ Vpartial
24BCM0123 (MUKESHROSHAN A V)
