A crude type of disappearing ink isbased on the following endothermic equilibrium: [Co(H 2 O) 6 ]Cl
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Question:
A crude type of disappearing ink isbased on the following endothermic equilibrium:
[Co(H 2 O) 6 ]Cl 2 ( aq ) ⇔ [CoCl 2 (H 2 O) 4 ] ( aq ) + 2H 2 O ( l )
(colorless) (blue)
If the reactant solution is used to write on a piece of paper and the paper is allowed to partially dry, what can be done to bringout the colored handwriting?
put the paper inan oven
addwater
decrease the volume
put the paper ina freezer
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