[global]

I first posted this in the wrong forum, I think this is the right one.

I'm not a student, but I am a total noob, so I don't know if I have provided enough information to solve this equation:

MgO + NaHSO4 + 5H2O-->

The first ingredient is magnesium oxide, and the second is sodium bisulfate - but I suspect everyone here knows that. : ) The reaction occurs at room temperature, and the addition of water is just enough to make it a thick paste.

[AWK]

http://www.tececo.com/history.magnesium_cements.php
http://www.crystalresearch.com/crt/ab43/479_a.pdf

[global]

Thank you for those links, I was not aware of the web site, although I am familiar with the basic concepts.  The paper you linked to does not use sodium bisulfate, so I still don't know how the two ingredients combine.

[BluRay]

MgO and water forms Mg(OH)₂; MgO and Mg(OH)₂ with NaHSO₄ forms MgSO₄ and Na₂SO₄. So at the end you have Mg(OH)₂, MgSO₄, Na₂SO₄ and the remaining water.
The link from Tececo seems to suggest that Mg(OH)₂, MgSO₄ and water could form a cement ("oxy sulfate phases").

[global]

Thank you, BluRay