DP Chemistry (last assessment 2024)

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Question 21N.2.hl.TZ0.d

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.2.hl.TZ0.d
Level hl Paper 2 Time zone TZ0
Command term Outline Question number d Adapted from N/A
d.
[Maximum mark: 1]
21N.2.hl.TZ0.d

Phosphoric acid, H3PO4 can form three different salts depending on the extent of neutralisation by sodium hydroxide.

Outline the reasons that sodium hydroxide is considered a Brønsted–Lowry and Lewis base.

[1]

Markscheme

Brønsted–Lowry base:
proton acceptor

AND

Lewis Base:
e– pair donor/nucleophile ✔

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