Page 10 - E-Science Prep3 2024-2025 t1 Unit2_Neat
P. 10
Science department
Prep.3
Lesson 2: Speed of Chemical Reactions
Very fast reactions Relatively slow reactions
“very short time” Fireworks “short time” Oil + NaOH .. Soap
Very slow reactions Too slow reactions
“months” Rusting of iron “millions of years” petroleum oil
Speed of chemical reaction
The change in the concentration of the reactants & resultants at a unit time.
Product Conc.: Reactant Conc.:
at the beginning at the beginning
the smallest zero% the largest 100%
by time: increases by time: decreases
at the end: at the end:
the largest 100% the smallest zero%
The measuring unit of concentration of the substance is mole/liter.
19
Second Term
Term
