No stupid answers please
2007-03-18 13:04:57 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
There is no simple way. The two common chemical tests are:
1. Acidify with acetic acid and add KNO2 (potassium nitrite). Add a little CCl4 and shake. If the CCl4 layer is purple, you have iodide present in the original sample.
2. Acidify with nitric acid and add Fe(NO3)3. Add a little CCl4 and shake. If the CCl4 layer is purple, you have iodide present in the original sample.
You can probably use chloroform instead of the CCl4.
You can also add AgNO3 to a solution. If you see yellow precipitate, it has iodide. If it isn't present the precipitate is pure white. The problem is that the level of KI in salt is low, so in this test the yellow is hard to see and it is not a definitive test.
2007-03-18 18:48:50 · answer #1 · answered by Peter Boiter Woods 7 · 1⤊ 0⤋
There is a taste difference. If you want pure salt get Kosher Salt.
2007-03-18 13:17:57 · answer #2 · answered by John S 6 · 0⤊ 0⤋
all table salt in the US is iodized, but you can't tell by the naked eye.
2007-03-18 13:12:56 · answer #3 · answered by ranaway628 3 · 0⤊ 0⤋
i dont know...check the label...sorry if this is a stupid answer...
2007-03-18 13:12:43 · answer #4 · answered by michshell159 2 · 1⤊ 0⤋