A white precipitate was formed when BaCl\(_{2(aq)}\) was added to an aqueous solution of a...

WAEC 2022

A white precipitate was formed when BaCl\(_{2(aq)}\) was added to an aqueous solution
of a salt X. The precipitate dissolved in dilute HCl with rapid effervescence. Salt X is likely to contain

A. SO\(_{4}\) \(^{2-}\) ions
B. SO\(_{3}\) \(^{2-}\) ions
C. NO\(_{3}\)- ions
D. CO\(_{3}\) \(^{2-}\)- ions

JAMB CBT Mobile App 2025 - Free Download

JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!

WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076

Correct Answer: Option B

Explanation

A salt that forms a white precipitate (ppt) with BaCl2 and is soluble in HCl is a sulphite (SO3\(^{2-}\)) salt.

A salt that forms a white precipitate with BaCl₂ and is insoluble in HCl is a sulphate (SO₄²⁻), specifically a salt containing the sulfate anion, such as sodium sulfate (Na₂SO₄).

Previous Next

Go back to Chem classroom

Report an Error Ask A Question Download App

Contributions ({{ comment_count }})

Please wait...

{{ settings.no_comment_msg ? settings.no_comment_msg : 'There are no comments' }}

Quick Questions

please, who's good at chemistry (specifically: Stoichiometry and other topics) pls help a sister in need🙏? Answer this

14 Answers · Chemistry · 2 days ago
jamb mock question? Answer this

1 Answers · Biology · 9 hours ago
Please l activated my school app on my phone, and I activated it on my PC it's saying not activated? Answer this

1 Answers · 7 hours ago