If the pool water was found to be pH 8.0, should an acid or base be added to return it back to normal (pH 7.2-7.6)? What type of double displacement reaction is this?

Bis the answerhope it !

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o

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