When ozone reacts with an excess of potassium iodide solution buffered with a borate…
CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions
Problem
When ozone reacts with an excess of potassium iodide solution buffered with a borate buffer (pH 9.2), iodine is liberated and can be titrated against a standard solution of sodium thiosulphate as a quantitative method for estimating O3 gas. When liberated I2 reacts with sodium thiosulphate, what product(s) are formed?
(1) S4O62−
(2) SO42−
(3) S2O42−
(4) S