PAG 12.2 – Investigating the copper content of brass screws
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Question 1 of 30
1. Question
What concentration of sodium thiosulfate should be used?
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Question 2 of 30
2. Question
What concentration of potassium iodide should be used?
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Question 3 of 30
3. Question
What does brass contain?
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Question 4 of 30
4. Question
What type of experiment is this?
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Question 5 of 30
5. Question
What type of reaction is this?
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Question 6 of 30
6. Question
What website can be used to find hazard information on the chemicals being used within this experiment?
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Question 7 of 30
7. Question
How much brass should be measured out?
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Question 8 of 30
8. Question
How much nitric acid should be measured out?
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Question 9 of 30
9. Question
What is one hazard when using nitric acid within an experiment?
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Question 10 of 30
10. Question
What should brass be dissolved in?
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Question 11 of 30
11. Question
What safety procedure must be carried out when dissolving brass?
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Question 12 of 30
12. Question
What gas is released when brass is dissolved in nitric acid?
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Question 13 of 30
13. Question
What is one hazard of nitrogen dioxide?
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Question 14 of 30
14. Question
What type of graduated flask should be used?
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Question 15 of 30
15. Question
What type of flask should be used?
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Question 16 of 30
16. Question
What is brass?
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Question 17 of 30
17. Question
What does brass contain?
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Question 18 of 30
18. Question
What colour is the solution containing brass and copper iodide?
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Question 19 of 30
19. Question
What colour will the end point be?
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Question 20 of 30
20. Question
What is added to the titration solution?
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Question 21 of 30
21. Question
What colour is formed when the titrated brass and copper iodide solution has starch added to it?
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Question 22 of 30
22. Question
What is the final end point colour?
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Question 23 of 30
23. Question
What percentage of copper by mass does a typical piece of brass contain?
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Question 24 of 30
24. Question
During the titration of the brass solution with potassium iodide, what is formed?
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Question 25 of 30
25. Question
What state will the copper iodide be in?
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Question 26 of 30
26. Question
During the titration of the brass solution with potassium iodide, what is formed?
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Question 27 of 30
27. Question
What state will the iodine be in?
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Question 28 of 30
28. Question
What should be calculated when carrying out a titration?
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Question 29 of 30
29. Question
When titrating brass with potassium iodide, what charge will the Cu be?
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Question 30 of 30
30. Question
When titrating brass with potassium iodide, what charge will the I ions be?
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