What color does sodium sulfide turn?

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Study for the US EPA Model Lead Inspector Test. Use flashcards and multiple-choice questions with hints and explanations for comprehensive preparation. Get exam-ready with ease!

Multiple Choice

What color does sodium sulfide turn?

Explanation:
Sodium sulfide provides sulfide ions that react with lead compounds in paint to form lead sulfide, which is a black, insoluble precipitate. In the lead screening test, seeing a black color indicates the presence of lead. Other colors wouldn’t indicate lead with this test (for example, zinc sulfide can be white, but that would point to zinc rather than lead). So the observed color is black.

Sodium sulfide provides sulfide ions that react with lead compounds in paint to form lead sulfide, which is a black, insoluble precipitate. In the lead screening test, seeing a black color indicates the presence of lead. Other colors wouldn’t indicate lead with this test (for example, zinc sulfide can be white, but that would point to zinc rather than lead). So the observed color is black.

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