Page 346 - Chemistry eBook

Important Formulas and Equations
Density
Mole Calculations Percent Error Percent Composition
Concentration
m d = V
d = density m = mass
V = volume
given mass gram-formula mass
number of moles =
% error = measured value – accepted value × 100
Table T: Titration
% composition by mass = mass of part × 100 mass of whole
parts per million = mass of solute × 1000000 mass of solution
molarity = moles of solute liter of solution
accepted value
Reffy, Table T (p. 12): Titration
Combined Gas Law = TT
This is the formula that we
use to
T = temperature
P1V1 P2V2 P = pressure
V = volume
find the molarity or volume of the acid or base.
1
2
Titration
MAVA = MBVB
MA = molarity of H+ MB = molarity of OH– VA = volume of acid VB = volume of base
Explanation of formula key:
q = heat Hf = heat of fusion
m = mass H = heat of vaporization
∆T = change in temperature
• Volume: How much space the acid or base takes up. This will be expressed as mL
q = mC∆T
Heat q = mH fv
•Molarity:Theconcentqra=timoHnoftheacidCo=rsbpaecsiefi.chTehaitscaipsaceitxypressedas‘M’.
(milliliters) or L (liters).
K = kelvin
°C = degree Celsius
Temperature
K = °C + 273
• H+ = Acid • OH = Base
v
There are many Regents questions based on this Reffy.
Reference Tables for Physical Setting/Chemistry – 2011 Edition
12
DET 609 ADU
345 © UNIT 9: ACIDS AND BASES