Zadanie 5a
Determine the order of reaction with respect to ClO2 and with respect to OH−.
Order of reaction and rate graphs
Define the order with respect to a reactant and the overall order, and sketch, identify and analyse concentration-time and rate-concentration graphs for zero, first and second order reactions, including constant half-life as the sign of first order.
Tę umiejętność sprawdzają 24 zadania wzorowane na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 24 Otwórz w wyszukiwarce z filtrami
Zadanie 6a
Deduce the order of reaction with respect to NO and with respect to Cl2, and write the rate equation.
Zadanie 24
The concentration of reactant A was followed over time, and the rate of the reaction was measured at several concentrations of A. What is the order of reaction with respect to A? A. Zero order B. First order C. Second order D. Cannot be determined
- Materiał graficzny
Zadanie 3b
In moist air carbonyl dibromide is slowly hydrolyzed: Br2CO(g) + H2O(g) → CO2(g) + 2 HBr(g) (i) Suggest a method of monitoring the progress of this reaction at constant temperature so that its rate can be determined. (ii) Outline two reasons why a…
- Materiał graficzny
Zadanie 8d
When 1-bromopropane is warmed with aqueous sodium hydroxide, NaOH(aq), propan-1-ol is formed. (i) State the name given to this reaction's mechanism. (ii) Draw the structure of the transition state that occurs during this mechanism. (iii) Deduce the rate…
Zadanie 27
The rate of the reaction between propanone and iodine in acidic solution was measured at a fixed concentration of the acid catalyst. CH3COCH3(aq) + I2(aq) → CH3COCH2I(aq) + HI(aq) What is the overall reaction order? A. Zero order B. First order C.…
- Tabela do uzupełnienia
Zadanie 27
The table shows how the initial rate of the reaction between X and Y depends on the concentrations of the reactants. What is the order of reaction with respect to each reactant? A. X: 1, Y: 1 B. X: 2, Y: 1 C. X: 1, Y: 2 D. X: 2, Y: 0
- Tabela do uzupełnienia
Zadanie 30
The following results were obtained for the reaction between bromate(V) ions, bromide ions and hydrogen ions in aqueous solution. BrO3−(aq) + 5 Br−(aq) + 6 H+(aq) → 3 Br2(aq) + 3 H2O(l) Which row gives the order of reaction with respect to BrO3−,…
- Tabela do uzupełnienia
Zadanie 3d
The forward reaction is first order with respect to cyclohexane. C6H12(g) ⇌ C6H6(g) + 3 H2(g) (i) Sketch a graph showing how the rate varies with the concentration of cyclohexane. (ii) Deduce the reaction's rate equation, and state the units of the…
- Materiał graficzny
Zadanie 29
The reaction 2 P → S + T was studied by measuring the initial rate at different initial concentrations of P. Which graph shows that the reaction is first order with respect to P? A. Graph A B. Graph B C. Graph C D. Graph D
- Materiał graficzny
Zadanie 3e
The reaction takes place on the surface of a nickel catalyst. The following mechanism is proposed, in which Ni-C represents carbon atoms bonded to the nickel surface: CH4 + Ni → Ni−C + 2 H2 (slow) Ni−C + CO2 → Ni−CO + CO (fast)…
- Materiał graficzny
Zadanie 6a
The student then followed the reaction with a spectrophotometer, which records the light absorbed by the mixture and so gives the concentration of the dye throughout the reaction. The graph shows [D+] against time for experiment 3. (i) Use the graph to…
- Tabela do uzupełnienia
- Materiał graficzny
Zadanie 20
The reaction between nitrogen monoxide and chlorine gives the following rate data at a certain temperature. 2 NO(g) + Cl2(g) → 2 NOCl(g) What is the overall order of the reaction? A. 0 B. 1 C. 2 D. 3
- Tabela do uzupełnienia
Zadanie 24
Which graph of rate of reaction against concentration of the reactant is correct for a reaction that is second order with respect to that reactant? A. Graph A B. Graph B C. Graph C D. Graph D
- Materiał graficzny
Zadanie 6a
Nitrogen dioxide, NO2, is one of the brown pollutant gases in photochemical smog. It can react with carbon monoxide, which is also present in polluted air. NO2(g) + CO(g) → NO(g) + CO2(g) (i) Suggest how the rate of this reaction could be…
- Tabela do uzupełnienia
Zadanie 21
The reaction between hydrogen and iodine monochloride has the overall equation H2(g) + 2 ICl(g) → I2(g) + 2 HCl(g) It proceeds by a two-step mechanism. H2 + ICl → HI + HCl (slow step) HI + ICl → I2 + HCl (fast step) What is the rate…
Zadanie 36
1-Bromobutane reacts with warm aqueous sodium hydroxide to form butan-1-ol. CH3CH2CH2CH2Br + OH− → CH3CH2CH2CH2OH + Br− Which row gives the mechanism and the rate expression of this reaction? A. SN1; rate = k[C4H9Br] B.…
Zadanie 9a
The initial rate of the iodination of propanone in aqueous acid was measured at constant temperature. CH3COCH3(aq) + I2(aq) → CH3COCH2I(aq) + HI(aq) Four experiments were carried out and the results are given in the table. Deduce the overall rate…
- Tabela do uzupełnienia
Zadanie 21
Each option shows a graph of the concentration of a reactant against time and a graph of the rate against the concentration of that reactant. In which option do the two graphs correspond to the same order of reaction? A. Pair A B. Pair B C. Pair C D. Pair D
- Materiał graficzny
Zadanie 2c
The graph shows the volume of hydrogen produced when a small piece of zinc reacts with a large excess of 2.0 mol dm−3 hydrochloric acid. (i) Deduce from the graph how the rate of reaction depends on the amount of zinc present. (ii) The rate is…
- Materiał graficzny
Zadanie 4a
The reaction between nitrogen dioxide and carbon monoxide was studied at 600 K. NO2(g) + CO(g) → NO(g) + CO2(g) The following experimental data were obtained. (i) Deduce the order of reaction with respect to nitrogen dioxide. (ii) Deduce the rate…
- Tabela do uzupełnienia
Zadanie 20
The table shows initial rate data for the hydrolysis of a tertiary halogenoalkane, RBr, with aqueous sodium hydroxide at constant temperature. Which statements are correct? I. The reaction is first order with respect to hydroxide ions. II. The reaction is…
- Tabela do uzupełnienia
Zadanie 6a
This reaction could proceed through either an SN1 or an SN2 mechanism, depending on the reaction conditions. Sketch a graph of the rate against the nucleophile concentration, [OH−], for each of the mechanisms on the axes…
- Materiał graficzny
Zadanie 20
The following data were obtained at constant temperature for the reaction 2 NO(g) + Br2(g) → 2 NOBr(g). What rate equation can be deduced from the data? A. Rate = k[NO][Br2] B. Rate = k[NO]2[Br2] C.…
- Tabela do uzupełnienia