DP Chemistry (first assessment 2025)

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Question 22M.1A.SL.TZ1.9

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.SL.TZ1.9
Level	SL	Paper	1A	Time zone	TZ1
Command term	State	Question number	9	Adapted from	N/A

9.

[Maximum mark: 1]

22M.1A.SL.TZ1.9

A compound consists of the ions Ca²⁺ and PO₄^3–. What are the name and formula of the compound?

[1]

Markscheme

D

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.1—The ionic model » Structure 2.1.2—The ionic bond is formed by electrostatic attractions between oppositely charged ions. Deduce the formula and name of an ionic compound from its component ions, including polyatomic ions. Binary ionic compounds are named with the cation first, followed by the anion. The anion adopts the suffix “ide”. Interconvert names and formulas of binary ionic compounds.