QUESTION 9 Select ALL statements that are TRUE Adding iron nitrate to tea causes

Question

QUESTION 9 Select ALL statements that are TRUE Adding iron nitrate to tea causes a conbustion reaction to occur: carbon dioxide and water are the products Based on the observations, it is probable that the iron nitrate forms a iron-tannate precipitate since the black solution was not entirely transparent. The addition of iron nitrate decomposed the tannins and the result was a black sludge-like solution. Iron atoms replace the oxygen atoms in the tannic acid structure and produces oxygen gas bubbles in solution. Tannins are present in many sources such as fruits, nuts, leaves, tea, coffee and wine.

Explanation / Answer

1.True iron nitrate reacts with tannic acid of tea

5.true tannins are present In fruits nuts legumes tea coffee wine

2-statement is true a black precipitate is formed

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