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Questions and Answers
What color precipitate is formed when ferrous sulphate reacts with sodium hydroxide?
What color precipitate is formed when ferrous sulphate reacts with sodium hydroxide?
- Gelatinous white
- Pale blue
- Reddish brown
- Dirty green (correct)
Which chemical reaction results in the formation of a gelatinous white precipitate?
Which chemical reaction results in the formation of a gelatinous white precipitate?
- ZnSo4 + 2NaOH → Na2SO4 + Zn(OH)2↓ (correct)
- FeCl3 + 3NaOH → 3NaCl + Fe(OH)3↓
- FeSO4 + 2NaOH → Na2SO4 + Fe(OH)2↓
- CuSO4 + 2NaOH → Na2SO4 + Cu(OH)2↓
Which chemical reaction represents the formation of a pale blue precipitate?
Which chemical reaction represents the formation of a pale blue precipitate?
- ZnSo4 + 2NaOH → Na2SO4 + Zn(OH)2↓
- FeSO4 + 2NaOH → Na2SO4 + Fe(OH)2↓
- FeCl3 + 3NaOH → 3NaCl + Fe(OH)3↓
- CuSO4 + 2NaOH → Na2SO4 + Cu(OH)2↓ (correct)
What is the chemical formula for the reddish brown precipitate formed when ferric chloride reacts with sodium hydroxide?
What is the chemical formula for the reddish brown precipitate formed when ferric chloride reacts with sodium hydroxide?
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Which combination of chemicals does not result in the formation of a precipitate?
Which combination of chemicals does not result in the formation of a precipitate?
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What is the purpose of adding sodium hydroxide solution to the various chemicals in the precipitation reactions?
What is the purpose of adding sodium hydroxide solution to the various chemicals in the precipitation reactions?
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Which chemical reaction does not correspond to the correct formation of a precipitate?
Which chemical reaction does not correspond to the correct formation of a precipitate?
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