DP Chemistry (last assessment 2024)

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Question 17N.2.hl.TZ0.d

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.2.hl.TZ0.d
Level hl Paper 2 Time zone TZ0
Command term State Question number d Adapted from N/A
d.
[Maximum mark: 1]
17N.2.hl.TZ0.d

The reactivity of organic compounds depends on the nature and positions of their functional groups.

State an equation for the formation of NO2+.

[1]

Markscheme

HNO3 + 2H2SO4 ⇌ H3O+ + NO2+ + 2HSO4–

Accept: HNO3 + 2H2SO4  ⇌  NO2+ + HSO4– + H2O.

Accept: HNO3 + 2H2SO4  ⇌   H2NO3+ + HSO4–.

Accept single arrow instead of equilibrium sign.

Accept equivalent two step reactions in which sulfuric acid first behaves as strong acid and protonates nitric acid, before behaving as dehydrating agent removing water from it.

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