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100 parts of CaCO3 is equivalent to the __________ parts of sodium carbonate.(a) 103(b) 104(c) 105(d) 106I have been asked this question in class test.I need to ask this question from Problems, Units and Formulae topic in chapter Water of Applied Chemistry

Answer»

Right CHOICE is (d) 106

Easiest explanation: 100 parts of CaCO3 is EQUIVALENT to the 106 parts of the sodium carbonate. So, the washing SODA REQUIREMENT is 100/106{temp Ca hardness+2.Mg hardness+perm(Mg+Fe+3Al)hardness+1/2 HCL+H2SO4-NaAlO2-CO2} .



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