Question

would you able to check if water is hard by using a detergent​

Answer 1

Answer:

because they both form magnesium and calcium salts

Answer 2

ᴅᴇᴛᴇʀɢᴇɴᴛs ᴀʀᴇ ᴀᴍᴍᴏɴɪᴜᴍ ᴏʀ sᴜʟᴘʜᴏɴᴀᴛᴇ sᴀʟᴛs ᴏғ ʟᴏɴɢ ᴄʜᴀɪɴ ᴄᴀʀʙᴏxʏʟɪᴄ ᴀᴄɪᴅs. ᴜɴʟɪᴋᴇ sᴏᴀᴘ, ᴛʜᴇʏ ᴅᴏ ɴᴏᴛ ʀᴇᴀᴄᴛ ᴡɪᴛʜ ᴄᴀʟᴄɪᴜᴍ ᴀɴᴅ ᴍᴀɢɴᴇsɪᴜᴍ ɪᴏɴs ᴘʀᴇsᴇɴᴛ ɪɴ ʜᴀʀᴅ ᴡᴀᴛᴇʀ ᴛᴏ ғᴏʀᴍ sᴄᴜᴍ. ... ᴛʜɪs ᴍᴇᴀɴs ᴛʜᴀᴛ ᴅᴇᴛᴇʀɢᴇɴᴛs ᴄᴀɴ ʙᴇ ᴜsᴇᴅ ɪɴ ʙᴏᴛʜ sᴏғᴛ ᴀɴᴅ ʜᴀʀᴅ ᴡᴀᴛᴇʀ. ᴛʜᴇʀᴇғᴏʀᴇ, ɪᴛ ᴄᴀɴɴᴏᴛ ʙᴇ ᴜsᴇᴅ ᴛᴏ ᴄʜᴇᴄᴋ ᴡʜᴇᴛʜᴇʀ ᴛʜᴇ ᴡᴀᴛᴇʀ ɪs ʜᴀʀᴅ ᴏʀ ɴᴏᴛ.