Chemistry, asked by hari11316, 4 months ago

calsium carbonate is used to express hardness​

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Answered by Anonymous
0

When hardness is expressed as 'mg/l as CaCO3', it's calculated as if all the calcium and magnesium were present only as calcium carbonate. Hard water is a mixture of calcium and magnesium, together with bicarbonate, sulphate, chloride, etc. Ca – is calcium, C carbon and O oxygen.

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Answered by Anonymous
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Answer:

ᴡʜᴇɴ ʜᴀʀᴅɴᴇꜱꜱ ɪꜱ ᴇxᴘʀᴇꜱꜱᴇᴅ ᴀꜱ 'ᴍɢ/ʟ ᴀꜱ ᴄᴀᴄᴏ3', ɪᴛ'ꜱ ᴄᴀʟᴄᴜʟᴀᴛᴇᴅ ᴀꜱ ɪꜰ ᴀʟʟ ᴛʜᴇ ᴄᴀʟᴄɪᴜᴍ ᴀɴᴅ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴡᴇʀᴇ ᴘʀᴇꜱᴇɴᴛ ᴏɴʟʏ ᴀꜱ ᴄᴀʟᴄɪᴜᴍ ᴄᴀʀʙᴏɴᴀᴛᴇ. ʜᴀʀᴅ ᴡᴀᴛᴇʀ ɪꜱ ᴀ ᴍɪxᴛᴜʀᴇ ᴏꜰ ᴄᴀʟᴄɪᴜᴍ ᴀɴᴅ ᴍᴀɢɴᴇꜱɪᴜᴍ, ᴛᴏɢᴇᴛʜᴇʀ ᴡɪᴛʜ ʙɪᴄᴀʀʙᴏɴᴀᴛᴇ, ꜱᴜʟᴘʜᴀᴛᴇ, ᴄʜʟᴏʀɪᴅᴇ, ᴇᴛᴄ. ᴄᴀ – ɪꜱ ᴄᴀʟᴄɪᴜᴍ, ᴄ ᴄᴀʀʙᴏɴ ᴀɴᴅ ᴏ ᴏxʏɢᴇɴ.

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