You may possibly want to check this somewhat related RG discussion: https://www.researchgate.net/post/Does_anybody_have_literature_sources_for_solubility_constants_of_salt_hydrates
About the pH of CaCl2 aq. solutions ― cf. my posts at: https://www.researchgate.net/post/How-to-increase-pH-for-a-solution-without-making-a-chemical-reaction-with-CaCl2