1)What is the equcation of acidification of wine then liberates all sulphur dioxide?
2)what is the equcation when the solution is titrated with iodine?
3)Why after adding sulphuric acid into the mixture solution of wine and sodium hydroxide, the titration should be done quickly?
Sulphur dioxide in wine
2010-12-04 8:23 pm
回答 (1)
2010-12-04 9:13 pm
✔ 最佳答案
1. reaction between sulfite and acid SO3(2-) + 2H(+) ------> H2SO3 ------> H2O + SO2
2. redox reaction
SO3(2-) + H2O + I2 ------> SO4(2-) + 2H(+) + 2I(-)
3.
sulphur dioxide is a gas. after acidification, sulphite inside solution turns into gas and starts escaping from the solution. this will cause some loss, which results to under-estimation of sulphur dioxide content.
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