what will happen if an iodine crystal will be heated?
what is its difference to the unheated one with respect to state, color, solubility in water, and their effect on 2mL of starch solution?
When a lead nitrate will also be heated until no further change is observed, what will be produced?
2006-12-15 22:02:46 · 1 answers · asked by jann kyle_upvcc 1 in Science & Mathematics ➔ Chemistry
Iodine is a dark-gray/purple-black solid that sublimes at standard temperatures into a purple-pink gas that has an irritating odor.i.e. get directly converted to gaseous state from solid without formation of liquid.
Elemental iodine is poorly soluble in water, with one gram dissolving in 3450 ml at 20 °C and 1280 ml at 50 °C
2 ml of starch solution will turn purple or reddish purple on contact with Iodine.
When lead(II) nitrate is heated, it decomposes to lead(II) oxide, accompanied by a crackling noise referred to as decrepitation.
2 Pb(NO3)2(s) → 2 PbO(s) + 4 NO2(g) + O2(g)
2006-12-15 22:09:58 · answer #1 · answered by Som™ 6 · 0⤊ 0⤋