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===Meaning===
An [[insoluble]] [[material]] is one that cannot be easily [[dissolve]]d in [[water]].
===References===
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Insoluble, page 42, Gateway GCSE Chemistry, Oxford, OCR '']