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

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

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