CH-1045
Acids and alkalis
Chemistry · Secondary 4 · Hard · Acids and alkalis
A sample of treated water may contain excess aluminum sulfate solution, which is acidic.
Four water samples are tested:
1. pH 4, gives a white precipitate with excess aqueous ammonia.
2. pH 4, no reaction with excess aqueous ammonia.
3. pH 9, gives a white precipitate with excess aqueous ammonia.
4. pH 9, no reaction with excess aqueous ammonia.
Which sample most likely contains excess aluminum sulfate?
Four water samples are tested:
1. pH 4, gives a white precipitate with excess aqueous ammonia.
2. pH 4, no reaction with excess aqueous ammonia.
3. pH 9, gives a white precipitate with excess aqueous ammonia.
4. pH 9, no reaction with excess aqueous ammonia.
Which sample most likely contains excess aluminum sulfate?
- Sample 1
- Sample 2
- Sample 3
- Sample 4
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