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Revision notes on Rates of Reaction Factors for the Cambridge (CIE) IGCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams.
Rates usually increase when the concentration of one or more of the reactants increases. For example, calcium carbonate (CaCO 3 ) deteriorates as a result of its reaction with the pollutant sulfur dioxide.
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts.
14 gru 2018 · Nature Chemistry - Scientists and non-scientists alike have long been dreaming of elements with mighty properties. Perhaps the fictional materials they have conjured up are not as far from...
16 wrz 2022 · Describe rate in terms of the conditions of successful collisions. Describe how changing the temperature, concentration of a reactant, or surface area of a reaction affects the rate of a reaction. Define a catalyst and how a catalyst affects the rate of a reaction.
Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure. For reactions involving one or more colored substances, rates may be monitored via measurements of light absorption.
The rate of natural increase gives demographers an idea of how a region's population is shifting over time. RNI excludes in-migration and out-migration, giving an indication of population growth based only on births and deaths.
