Is Mg(OH)2 sparingly soluble or insoluble?

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C_Yap
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Making notes. Both my AQA textbook and Chemrevise says that Mg(OH)2 are insoluble in water so will suspend.

However, the specification saysthat Mg(OH)2 is sparingly soluble.

What would I write in the exam to get the mark?
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Pigster
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Wikipedia says: 0.00064 g/100 mL (25 °C)

i.e. 156250 cm3 of water is need to dissolve 1 g

Sigma Aldrich say this:

Hmm, that didn't copy and paste well, here's a link: http://www.sigmaaldrich.com/united-k...olubility.html

i.e. Mg(OH)2 is practically insoluble.

If you have a saturated solution, it would have a pH of around 10.34.

Pro tip: always go with the specification.
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irene_h
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In AQA textbook, it says that Mg(OH)2 is sparingly soluble. But I did get confused by Chemrevise, it says it's insoluble.
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b.r.2018
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If last years mark scheme is anything to go by, you should avoid saying insoluble and should put sparingly soluble.
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AftabGujral
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Sparingly soluble. Look here

https://www.chemguide.co.uk/inorgani...olubility.html
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