PAG 10.2 – Rates – thiosulfate and acid – Primrose Kitten

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PAG 10.2 – Rates – thiosulfate and acid

Last updated: 11/03/2020

OCR-A A-Level Chemistry Rates of reaction PAG 10.2 – Rates – thiosulfate and acid

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Question 1 of 35

1. Question
What concentration of sodium thiosulfate should be used?
- 0.150 mol dm $^{-3}$
- 2.028 mol dm $^{-3}$
- 2.000 mol dm $^{-3}$
- 0.025 mol dm $^{-3}$
Correct

Incorrect
Question 2 of 35

2. Question
What concentration of hydrochloric acid should be used?
- 2.000 mol dm $^{-3}$
- 2.028 mol dm $^{-3}$
- 0.150 mol dm $^{-3}$
- 0.025 mol dm $^{-3}$
Correct

Incorrect
Question 3 of 35

3. Question
What charge does a thiosulfate ion have?
- -2
- +2
- +1
- -1
Correct

Incorrect
Question 4 of 35

4. Question
How can the rate of reaction be found during the reaction between sodium thiosulfate and hydrochloric acid?
- Observe the precipitate of sulfur
- Measure the pH change
- Measure the volume of gas produced
- Measure the change in mass
Correct

Incorrect
Question 5 of 35

5. Question
How many parts are there to this experiment?
- 2
- 1
- 4
- 3
Correct

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Question 6 of 35

6. Question
What type of sodium thiosulfate should be used?
- Aqueous
- Solid
- Liquid
- Gaseous
Correct

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Question 7 of 35

7. Question
What type of hydrochloric acid should be used?
- Aqueous
- Solid
- Liquid
- Gaseous
Correct

Incorrect
Question 8 of 35

8. Question
What piece of safety equipment must be worn?
- Goggles
- Lab coat
- Gloves
- Face mask
Correct

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Question 9 of 35

9. Question
What is being measured during part 1?
- Concentration of thiosulfate ions
- Volume of thiosulfate ions
- Volume of hydrogen ions
- Concentration of hydrogen ions
Correct

Incorrect
Question 10 of 35

10. Question
What is being measured during part 2?
- Concentration of hydrogen ions
- Volume of thiosulfate ions
- Volume of hydrogen ions
- Concentration of thiosulfate ions
Correct

Incorrect
Question 11 of 35

11. Question
How much hydrochloric acid should be measured out during part 1?
- 5 cm $^3$
- 50 cm $^3$
- 25 cm $^3$
- 15 cm $^3$
Correct

Incorrect
Question 12 of 35

12. Question
How much sodium thiosulfate should be measured out during part 1?
- 50 cm $^3$
- 5 cm $^3$
- 25 cm $^3$
- 15 cm $^3$
Correct

Incorrect
Question 13 of 35

13. Question
What should be added to hydrochloric acid during part 1?
- Sodium thiosulfate
- Distilled water
- Ethanol
- Potassium nitrate
Correct

Incorrect
Question 14 of 35

14. Question
As a reaction is timed during part 1, what should be continuously done?
- Swirling of the container
- Recording the temperature
- Addition of sodium thiosulfate
- Addition of hydrochloric acid
Correct

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Question 15 of 35

15. Question
What gas is formed during this reaction?
- Sulfur dioxide
- Sulfur oxide
- Oxygen
- Carbon dioxide
Correct

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Question 16 of 35

16. Question
What liquid is formed during this reaction?
- Water
- Chlorine
- Thionyl chloride
- Hydrochloric acid
Correct

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Question 17 of 35

17. Question
What variable should be changed when repeating part 1?
- Concentration of sodium thiosulfate
- Concentration of hydrochloric acid
- Volume of sodium thiosulfate
- Volume of hydrochloric acid
Correct

Incorrect
Question 18 of 35

18. Question
What order is this reaction?
- First order
- Zero order
- Third order
- Second order
Correct

Incorrect
Question 19 of 35

19. Question
What is the rate equation for this reaction?
- $Rate = k[S_2O_3^{2-}(aq)]$
- $Rate = k[S_2O_3(aq)]$
- $Rate = [S_2O_3^{2-}(aq)]$
- $Rate = k[S_2O_3^{2-}(aq)]^2$
Correct

Incorrect
Question 20 of 35

20. Question
What is the gradient of the constructed graph?
- 0.260
- 0.200
- 0.034
- 0.235
Correct

Incorrect
Question 21 of 35

21. Question
How many columns of data will be needed for the spreadsheet created in excel?
- 7
- 6
- 3
- 10
Correct

Incorrect
Question 22 of 35

22. Question
On what software should a spreadsheet be created?
- Excel
- Slideshow
- Publisher
- Word
Correct

Incorrect
Question 23 of 35

23. Question
What are the units for the volume of sodium thiosulfate?
- cm $^3$
- dm $^2$
- dm $^3$
- cm $^2$
Correct

Incorrect
Question 24 of 35

24. Question
What are the units for the volume of water?
- cm $^3$
- dm $^2$
- dm $^3$
- cm $^2$
Correct

Incorrect
Question 25 of 35

25. Question
What are the units for the volume of hydrochloric acid?
- cm $^3$
- dm $^2$
- dm $^3$
- cm $^2$
Correct

Incorrect
Question 26 of 35

26. Question
What are the units for the total volume?
- cm $^3$
- dm $^2$
- dm $^3$
- cm $^2$
Correct

Incorrect
Question 27 of 35

27. Question
What are the units for the concentration of thiosulfate ions?
- $mol dm^{-3}$
- $mol^{-3} dm$
- $mol^3 dm$
- $mol dm^3$
Correct

Incorrect
Question 28 of 35

28. Question
What are the units for time?
- Seconds, s
- Metres, m
- Metres per second, m/s
- Newtons, N
Correct

Incorrect
Question 29 of 35

29. Question
When creating your graph on excel for part 2, what variable is on the y-axis?
- Initial rate
- Concentration of hydrochloric acid
- Time
- Concentration of sodium thiosulfate
Correct

Incorrect
Question 30 of 35

30. Question
When creating your graph on excel for part 2, what variable is on the x-axis?
- Concentration of hydrochloric acid
- Initial rate
- Time
- Concentration of sodium thiosulfate
Correct

Incorrect
Question 31 of 35

31. Question
When creating your graph on excel for part 1, what variable is on the y-axis?
- Initial rate
- Concentration of hydrochloric acid
- Time
- Concentration of sodium thiosulfate
Correct

Incorrect
Question 32 of 35

32. Question
When creating your graph on excel for part 1, what variable is on the x-axis?
- Concentration of sodium thiosulfate
- Concentration of hydrochloric acid
- Time
- Initial rate
Correct

Incorrect
Question 33 of 35

33. Question
What are the units for initial rate?
- $s^{-1}$
- $mol dm^{-3} s^{-1}$
- $dm^{-3} s^{-1}$
- $mol^{-1} dm^{-3} s^{-1}$
Correct

Incorrect
Question 34 of 35

34. Question
What is the equation for the initial rate?
- 1 / T
- 10 / T
- T / 2
- 1 X T
Correct

Incorrect
Question 35 of 35

35. Question
How do you find the gradient of a line?
- change in y / change in x
- change in x / change in y
- change in x X change in y
- change in y + change in x
Correct

Incorrect

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