Which ion forms a green precipitate with sodium hydroxide?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the IGCSE Edexcel Chemistry Test with engaging flashcards and multiple-choice questions. Each question comes with detailed hints and explanations to enhance your learning experience. Master your exam with confidence!

Multiple Choice

Which ion forms a green precipitate with sodium hydroxide?

Explanation:
When a metal ion is treated with hydroxide ions, it can form a metal hydroxide. If that hydroxide is insoluble, it appears as a precipitate, and its color helps identify the ion. Iron(II) ions form iron(II) hydroxide, Fe(OH)2, which is pale green and shows up as a green solid when NaOH is added. Copper(II) hydroxide would be blue, iron(III) hydroxide is brown, and calcium hydroxide is only sparingly soluble and doesn’t give a distinct colored solid in this standard test. So the green precipitate points to iron(II) ions.

When a metal ion is treated with hydroxide ions, it can form a metal hydroxide. If that hydroxide is insoluble, it appears as a precipitate, and its color helps identify the ion. Iron(II) ions form iron(II) hydroxide, Fe(OH)2, which is pale green and shows up as a green solid when NaOH is added. Copper(II) hydroxide would be blue, iron(III) hydroxide is brown, and calcium hydroxide is only sparingly soluble and doesn’t give a distinct colored solid in this standard test. So the green precipitate points to iron(II) ions.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy