Importance of Chemistry in Our Society
Many day-to-day activities rely on chemistry
World issues need scientific solutions: health, energy, and environment
Chemistry is a component of most scientific areas—thus it is a central science
-- particulate (atomic/molecular) nature of matter as it relates to real observations
(the macroscopic world).
– chemistry is an empirical
science; it relies on
(ii) Taking experimental observations (using computation, too!),
Data accumulation and organization,
Checking the scientific literature,
Drawing inferences and conclusions
Repeating step (i)…
Beyond the Molecular Frontier
, National Research Council, 2003, which lists some grand
challenges for chemists and chemical engineers.
Two important resources
Handbook of Chemistry and Physics
, D.R. Lide, Editor-in-Chief, CRC Press, Boca Raton, FL.
This handbook contains a lot of useful information about various chemical substances.
published annually and there are occasional updates.
Iowa State University library’s website
for e-resources in chemistry is another valuable
resource for scientific information.
, Chapter 1, pp. 1-13.
Practice PROBLEMS: (Ch. 1) 17-20
Chemists distinguish among different categories of matter based upon composition and
Fundamentally, there occur pure substances
of two or more substances.
(a) Pure Substances
Has a definite, constant composition and distinctive properties, e.g.,
color, density, conductivity, magnetism, smell.
Pure substances can be either