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a follow-up question from the experiment composition of hydrates

2006-09-25 05:01:57 · 6 answers · asked by ethene 1 in Science & Mathematics Chemistry

6 answers

The fact that the question specifies an "anhydrous salt" implies that the salt spontaneously absorbs water [from the air] and becomes hydrated. When the salt becomes hydrated, the weight of the water absorbed effects the weight of the overall substance.
In order to get a proper measurement of the weight of the salt (and not the salt + water), the measurement should be taken as soon as possible so as not to allow water being absorbed.

2006-09-25 05:07:25 · answer #1 · answered by mrjeffy321 7 · 4 1

Immediately Upon

2016-12-12 11:25:13 · answer #2 · answered by Anonymous · 0 0

b'coz anhydrous salts start absorbing water in the difference of 1 sec. after cooling and make the measurement wrong as they absorb water from their atmosphere and water increases the mass of anhydrous salts.

2006-09-25 05:32:34 · answer #3 · answered by unknown 2 · 1 1

i believe it is because the salt begins to absorb moisture from the air, and then becomes hydrated

2016-03-27 08:58:53 · answer #4 · answered by Anonymous · 0 0

because they absorbs water quickly to form hydrates.
hydrates have larger mass than the salt itself so the measurement will be inaccurate

2006-09-25 05:12:55 · answer #5 · answered by dan 2 · 1 1

because it will quickly re-hydrate

2006-09-25 05:07:22 · answer #6 · answered by shiara_blade 6 · 1 1

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