Reactant Product A 2 Cl - Cl 2 B Cl - ClO - C ClO 3 - Cl 2 D ClO - ClO 3 - Which conversion of reactant to product, A to D, involves the greatest change in oxidation state?

The oxidation state change in each conversion: (The oxidation state of chlorine is given above chlorine in each reactant and product) A) 2 Cl - - 1 to Cl 2 0 . The oxidation state change is of 0 - - 1 = 1 . B) Cl - - 1 to Cl + 1 O - - 2 . The oxidation state change is of + 1 - - 1 = 2 . C) Cl + 5 O 3 - - 2 to Cl 2 0 . The oxidation state change is of 5 - 0 = 5 . D) Cl + 1 O - - 2 to Cl + 5 O 3 - - 2 . The oxidation state change is of + 5 - + 1 = 4 . Hence, the greatest change (of 5 ) in oxidation state of chlorine is in conversion C.

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AS and A Level

IMPORTANT

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You suspect that a solid compound might be potassium bromide. Describe how you would test your idea. Then describe the positive results you would get if you were correct.

Important Questions on Group 17

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>Question>Q 5

Working with a partner, discuss what you would see in a test tube in which concentrated sulfuric acid is added drop-wise to solid potassium iodide that you would not see if the acid was added to potassium chloride.

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>Question>Q 5

Write equations, including state symbols to describe the reactions taking place in the test tube between concentrated sulfuric acid and potassium iodide.

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>Question>Q 5

Decide with your partner which one of the following ions is the strongest reducing agent:

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>EXAM-STYLE QUESTIONS>Q 1

	Reactant	Product
A	$2 {Cl}^{-}$	${Cl}_{2}$
B	${Cl}^{-}$	${ClO}^{-}$
C	${ClO}_{3}^{-}$	${Cl}_{2}$
D	${ClO}^{-}$	${ClO}_{3}^{-}$

Which conversion of reactant to product, A to D, involves the greatest change in oxidation state?

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>EXAM-STYLE QUESTIONS>Q 1

	Reactant	Product
A	$2 {Cl}^{-}$	${Cl}_{2}$
B	${Cl}^{-}$	${ClO}^{-}$
C	${ClO}_{3}^{-}$	${Cl}_{2}$
D	${ClO}^{-}$	${ClO}_{3}^{-}$

How many of the changes in the table are examples of oxidation?

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>EXAM-STYLE QUESTIONS>Q 2

Give the molecular formula of bromine.

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AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>EXAM-STYLE QUESTIONS>Q 2

List the elements bromine, chlorine, and iodine in order of boiling point, starting with the lowest.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 12 - Group 17>EXAM-STYLE QUESTIONS>Q 3

Identify which of these mixtures will result in a chemical reaction:

i. bromine solution and sodium chloride solution

ii. iodine solution and sodium bromide solution

iii. chlorine solution and potassium bromide solution

iv. bromine solution and sodium iodide solution

You suspect that a solid compound might be potassium bromide. Describe how you would test your idea. Then describe the positive results you would get if you were correct.

Important Questions on Group 17

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