Predicting products of a reaction and balancing [closed]

2BiOCl + NaOH = BiOH + NaCl. This is the reaction where I am trying to get Bismuth Hydroxide as one product and salt. My problem is what is the state of Bismuth Hydroxide? Whether it is BiOH or Bi (OH)2 or Bi(OH)3. How do I know which one I will get?

closed as off-topic by A.K., Jon Custer, Mithoron, Todd Minehardt, DrMoishe PippikAug 26 '18 at 22:40

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• You know that from the valence of Bi, and that you deduce by looking at BiOCl. – Ivan Neretin Aug 24 '18 at 10:02

Well, the reaction actually produces $\ce{BiO.OH}$. According to this site:
$$\ce{BiOCl + KOH <=> BiO.OH + KCl}$$