X is a white solid which can dissolve in water to give X(aq). When sulphur dioxide is passed into X(aq), a white precipitate is formed. When dilute sulphuric acid is added to X(aq)... X is a white solid which can dissolve in water to give X(aq). When sulphur dioxide is passed into X(aq), a white precipitate is formed. When dilute sulphuric acid is added to X(aq), a white precipitate is also formed. X is probably A sodium hydroxide, B sodium carbonate, C calcium hydroxide, D calcium carbonate.
Understand the Problem
The question is asking us to identify the white solid X based on its reactions with sulfur dioxide and dilute sulfuric acid, ultimately leading to the formation of white precipitates in both cases. We will analyze the possible substances to find which one matches the descriptions given.
Answer
Calcium carbonate
The compound X is most likely calcium carbonate.
Answer for screen readers
The compound X is most likely calcium carbonate.
More Information
Calcium carbonate, CaCO3, is a white solid that forms a white precipitate (calcium sulfite and calcium sulfate) when reacting with sulfur dioxide and sulfuric acid, respectively. In contrast, sodium compounds are either too soluble or don't produce a precipitate under these conditions.
Tips
A common mistake is assuming calcium hydroxide, as it can also form a precipitate, but it's less likely than calcium carbonate when specific reactions with sulfur dioxide and sulfuric acid are considered.
Sources
- Oxyacid - Formation, Sulfate, Salts | Britannica - britannica.com
- Sulfur dioxide - Wikipedia - en.wikipedia.org
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