A student investigated the rate of reaction between sodium thiosulphate and dilute hydrochloric acid.
- The student placed a conical flask over a cross on a piece of paper.
- The student mixed the solutions in the flask.
- The solution went cloudy.
- The student timed how long it took until the cross could not be seen.
The equation for the reaction is:
\[ \text{Na}_2\text{S}_2\text{O}_3(aq) + 2\text{HCl}(aq) \rightarrow 2\text{NaCl}(aq) + \text{H}_2\text{O}(l) + \text{SO}_2(g) + \text{S}(s) \]
Explain why the solution goes cloudy.
Answer (3)
You are forming a Sulfur precipitate in the solution which is likely why it goes cloudy.
Na₂ S₂O₃ ( aq ) + 2HCl ( aq ) = 2NaCl ( aq ) + H₂O ( l ) + SO₂ ( g ) + S ( s ) this **solution **goes cloudy because the student placed a conical flask over a cross on a **piece **of paper.
What is rate of reaction ?
The **speed **at which a chemical reaction occurs is known as the **reaction **rate or rate of reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant **concentration **per unit time. **Reaction **times might differ significantly.
The norm is to write **reactant **or product]to indicate the concentration of any reactant or product , respectively. Therefore, A's concentration may be represented as A, and B's concentration as [B]. Assume that the **reaction **starts at time t =0 , which is the start time.
Regarding Hcl, the reaction rate is zero -order. To get rid of the sulfur, empty the **beakers **and give them a good cleaning with paper towels.
Sulphur dioxide, sodium chloride, sulphur, and water are the **products **of the reaction between **sodium **thiosulphate and diluted hydrochloric acid. Sulfur dioxide is a gas with the **capacity **to entirely dissolve in aqueous solutions .
Thus, option **A **is correct.
To learn more about **rate of reaction **follow the link below;
https://brainly.com/question/13440548
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The solution goes cloudy due to the formation of sulfur, which is a solid precipitate that forms from the reaction between sodium thiosulphate and hydrochloric acid. This cloudiness occurs because sulfur is produced during the reaction, making it difficult to see any objects underneath the solution. The time taken for the cross beneath the flask to disappear helps measure the rate of the reaction.
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