7.1 DETERMINING RATE OF REACTION

7.1 DETERMINING RATE OF REACTION

by NOOR HAFIZAH HUSSAIN

​SMK RAJA CHULAN

​MODUL NILAM pg175

1. ​The rate of reaction is high if the reaction occurs fast within a short period of time.

2. ​The rate of reaction is low if the reaction occurs slowly within a short period of time.​

​MODUL NILAM pg178

​EXERCISE

​1 ) a)

i) CaCO₃ + 2HCl --> CaCl + H₂O + CO₂

​

​ii) - increase in volume of carbon dioxide gas// decrease in mass of calsium carbonate.

​

​ iii) is the changes in volume of carbon dioxide gas in 1s// the changes in mass of calsium carbonate in 1s.1

​MODUL NILAM pg178

​EXERCISE

​1) a) iv)

​MODUL NILAM pg179

​EXERCISE

​1) b)

​MODUL NILAM pg180

​EXERCISE

​1) c) i) 0.45 cm3 s-1 ii) 0.25 cm3 s-1

​

​ iii) 135s iv) 0.326 cm3 s-1

​

​ v) 0.405 + 0.1 cm3 s-1 vi) 0.217 + 0.1 cm3 s-1

​

​ d) - rate of reaction at 30s is higher than 105s

​ - because the concentration of hydrochloric acid decreases as time increases.

​MODUL NILAM pg181

​MODUL NILAM pg182

​

Multiple Choice

reaction of marble chips with hydrochloric acid

• fast reaction

• slow reaction

Multiple Choice

Rusting of iron gate

• fast reaction

• slow reaction

Multiple Choice

photosynthesis

• fast reaction

• slow reaction

Multiple Choice

Burning of petrol

• fast reaction

• slow reaction

Multiple Choice

Reaction of potassium with water

• fast reaction

• slow reaction

Multiple Choice

Fermentation of grapes to form alcohol

• fast reaction

• slow reaction

Multiple Choice

The changes in amount of reactants or products in any reaction which is chosen for the purpose of measuring rate of reaction must be observable and measureable.

• YES

• NO

Multiple Choice

The fast reaction has high rate of reaction.

• YES

• NO

Multiple Choice

The slow reaction has high rate of reaction.

• YES

• NO

​FACTOR AFFECTING THE RATE OF REACTIONS

1. ​Size of solid reactant

2. ​concentration of solution ( for reactant used in the form of solution)

3. ​Temperature of solution at which the reaction occurs

4. ​Presence of catalyst (for paticular reaction)

5. ​Pressure of gas reactant

​FACTOR AFFECTING THE RATE OF REACTIONS

​Size of solid reactant

(NILAM pg183)

​FACTOR AFFECTING THE RATE OF REACTIONS

​Concentration of solution ( for reactant used in the form of solution)

(NILAM pg183)

​FACTOR AFFECTING THE RATE OF REACTIONS

Temperature of solution at which the reaction occurs

(NILAM pg183)

​FACTOR AFFECTING THE RATE OF REACTIONS

​Presence of catalyst (for paticular reaction)

(NILAM pg183)

End of today's lesson.

See you next week!​