The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
Mg+
K+
CO22-
HCO3
Explanation
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Discussions (11)

Your correct bro. Hard waters are made up of ca ion, mg ion, iron (ii) etc but they don't form lather readily. potassium is soft so it forms lather . the answer is potassium

Here is an explanation:
The water which contain appreciable amount of soluble of ca,mg & iron ii salt will form a leather with ordinary soap so de answer is A
REF: Essential kmis3

answer is A water containing calcium and magnesium do not lather with soap. That is the component of hard water!

My school C is correct u guys are right...... CO2 is negligible while others lathers

Calcium and magnesium ion in water will not form a lather.please review your text books.i thinks the answer is potassium ion

@myschool..please review this and please scrutinize your answers meticulously before posting,you are doing a very splendid job but the answer is A..


