Science Question

i want to ask u that which solution will change colour from pink to blue after blowing by the hair dryer??

1 Answer

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  • 9 years ago
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    I think you may be in form 2

    In f2 level, only hexahydrate cobalt(II) chloride paper(contain hexahydrate cobalt(II) chloride solution) will turn from pink to blue by dehydrating it

    The use of hair dryer is dehydrating.

    Source(s): myself
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