Categories Physics permanent hard water contain compound Post author By esimpk Post date January 10, 2022 No Comments on permanent hard water contain compound A: sulphates and chlorides of calcium and magnesiun ← water in its chemical reaction compounds → Ion-exchange method is used to remove: Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.