CH-1048
Acids and alkalis
Chemistry · Secondary 4 · Medium · Acids and alkalis
A student tests a colourless solution X.
1. Universal indicator added to X gives a red colour.
2. X reacts with magnesium ribbon to produce a colourless gas that burns with a 'pop' when a lighted splint is applied.
What do these observations show about solution X?
1. Universal indicator added to X gives a red colour.
2. X reacts with magnesium ribbon to produce a colourless gas that burns with a 'pop' when a lighted splint is applied.
What do these observations show about solution X?
- X is a neutral solution containing water only.
- X is an alkali that reacts with magnesium to form hydrogen.
- X is an acidic solution that reacts with metals to produce hydrogen gas.
- X is a salt solution with pH greater than 7.
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