why doesn't heating the water to find the amount of water in the hydrated crystal not suitable for all hydrates
2007-12-01 13:28:56 · 3 answers · asked by JT 1 in Science & Mathematics ➔ Chemistry
Some materials, when heated, lose other volatiles other than water which will lead to an inaccurate weight loss. For example, carbonates will lose CO2 gas when heated. On heating, some hydroxide materials will become oxides (with loss of water) which really was not water of hydration. Some materials lose part of the water at one temperature, then additional water at a considerably higher temperature, so you might miss the water that comes off at the higher temperature.
2007-12-01 14:19:07 · answer #1 · answered by Flying Dragon 7 · 0⤊ 0⤋
Heat may decompose some hydrate into another substance that may also contain water , thus making the removal of the water of hydration inefficient.
In extreme heating, instead of forming crystals, hydrates may form syrup , which contains water (still).
2007-12-01 13:43:28 · answer #2 · answered by stilot 2 · 0⤊ 0⤋
Heat may have a detrimental effect on the substance other than just the water.
2007-12-01 13:37:21 · answer #3 · answered by Norrie 7 · 0⤊ 0⤋