mass
amount
molar mass
concentration
solution volume
gas volume
molar gas volume
Avogadro
constant, L
number of
entities, N
P4. OXIDATION & REDUCTION: REDOX PROCESSES
P4.1 Introduction: ideas of oxygen gain & loss / hydrogen loss & gain
Antoine Lavoisier suggested the name oxygene (‘acid-former’) for the substance absorbed from air when a substance burns
since the products of the combustion of non-metals such as phosphorus form acidic solutions once dissolved in water, in this case phosphoric acid.
Lavoisier's oxygen theory of combustion was eventually accepted and chemists began to describe any reaction between an element or compound and oxygen as oxidation, e.g.,
Thus early ideas concerning oxidation and reduction focused on oxygen gain and loss: on the basis of such a definition, the conversion of an element
to its oxide would be viewed as oxidation while the removal of oxygen
from a substance constitutes reduction.
You can check your understanding of these ideas by viewing the pdf download above which also considers the terms OXIDIZING AGENT & REDUCING AGENT.
The ideas concerning oxidation and reduction were later extended to include substances which lose hydrogen (oxidation) or gain hydrogen (reduction).
Attempting the question via the linked pdf on the left should clarify this complementary view.