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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Is Mg(OH)2 sparingly soluble or insoluble? watch
- Thread Starter
- 25-10-2017 14:17
- 25-10-2017 15:42
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.Last edited by Pigster; 25-10-2017 at 15:44.
- 03-06-2018 12:42
In AQA textbook, it says that Mg(OH)2 is sparingly soluble. But I did get confused by Chemrevise, it says it's insoluble.
- 03-06-2018 19:28
If last years mark scheme is anything to go by, you should avoid saying insoluble and should put sparingly soluble.
- 03-06-2018 21:10
Sparingly soluble. Look here