Vary the initial thiosulfate concentration according to Table 1 and measure the
time ∆t for each concentration three times. Note the results in Table 1.
• The initial concentrations of other species (at the time of mixing of solutions A
and B) should be as follows:
[Fe(NO3)3]0 = 6.5 mmol L-1, [KI]0 = 20.0 mmol L-1, [HNO3]0 = 0.1 mol L-1
,
[KNO3]0 = 0.9 mol L-1
, w(starch) = 0.02 %.
• The measurements are conducted at 25 °C.