Q1. Sodium thiosulfate solution reacts with dilute hydrochloric acid.
The solution becomes cloudy as the reaction takes place.
(a) The equation for the reaction is:
Na2S2O3(aq)
+
2 HCl(aq)
2 NaCl(aq)
+
SO2(g) +
H2O(1)
+
S(s)
Explain why the solution becomes cloudy.
(2)
(b)
Plan an investigation to show how the concentration of the sodium thiosulfate

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.