Cliffs AP Chemistry, 3rd Edition

Gravimetrics

Key Terms

Words that can be used as topics in essays:

accuracy

atomic theory

density

empirical formula

extensive property

fractional crystallization

heterogeneous

homogeneous

intensive property

isotopes

law of conservation of mass and energy

law of definite proportions

(law of constant composition)

limiting reactant

mixture

molecular formula

percentage yield

precision

random error

systematic error

theoretical yield

uncertainty

Key Concepts

Equations and relationships that you need to know:

• 1 nm = 1 ×l0–9m = 10 Å
  1 cm^3 = 1 mL
  °F = 1.8(°C) + 32
  K = °C + 273.16
  density=volumemass
  Avogadro’s number = 6.02 × 1023 = 1 mole
  number of moles=molecular weightmass

molecular weight of ideal gas = density ×molar volume

%%yield theoretical yield

actual yield

= # 100

%%composition mass of compound

mass of element in compound

= # 100

%%exp

exp

error ected value

observed value ected value

= # 100