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Sodium thiosulfate reacts with dilute hydrochloric acid as shown - AQA - A-Level Chemistry - Question 1 - 2019 - Paper 3

Question 1

Sodium thiosulfate reacts with dilute hydrochloric acid as shown. Na2S2O3(aq) + 2HCl(aq) → 2NaCl(aq) + SO2(g) + S(s) + H2O(l) 1. Give the simplest ionic equation f... show full transcript

Worked Solution & Example Answer:Sodium thiosulfate reacts with dilute hydrochloric acid as shown - AQA - A-Level Chemistry - Question 1 - 2019 - Paper 3

Step 1

Give the simplest ionic equation for this reaction.

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Answer

The reaction involves the thiosulfate ion reacting with hydrogen ions from the hydrochloric acid. The simplest ionic equation can be represented as:
$ext{S}_2 ext{O}_3^{2-} + 2 ext{H}^+ \rightarrow ext{SO}_2 + ext{H}_2 ext{O} + 2 ext{Na}^+$

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