Hydrochloric acid and thiosulphate are both clear liquids. They react to make sulphar, which if inhaled, can be harmfal. When te experiemtn takes place get rid of the mixture as soon as it goes cloudy. A cross must be drawn and the conical flask put on top. The higher the concentration of thiosulphate the quiker the reaction becuase there are more particles to react.
The different concentrations of thiosulphate must be poored separetly into the conical flask containing 15cm3 of hydrochloric acid. When the mixture goes cloudy the raction sto…
