11 Oktober 2011

FACTORS AFFECTING THE RATE OF REACTION

1. Total surface area of reactants (solids)
2. Concentration of reactants (solutions)
3. Pressure of reactants (gases)
4. Temperature of reactants
5. Presence of catalyst

Question
Which of the following factors affect the rate of reaction?
I  Size of the solid reactant
II Volume of the reactant
III Concentration of the reactant
IV Temperature of the reactant

10 Oktober 2011

Rate of Reaction

- Rate of reaction (kadar tindak balas) described as either high or low.
- Terms like fast and slow perlu di elakkan.
- Cth low rate of reaction; rusting of iron, fermentation of glucose solution, photosynthesis
- Cth high rate of reaction; neutralisation between hydrochloric acid and sodium hydroxide solution, formation of lead (II) iodide precipitate by double decomposition between lead(II) nitrate solution and potassium iodide solution, burning of magnesium ribbon


Q. Which process has the highest rate of reaction?
      A   Rusting
      B   Fermentation
      C   Combustion
      D   Photosynthesis

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