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answer 1.3 only thanks 1.3 Explain in detail the process by which water gets Hard (formation of hard water). (5) 1.4 Using Microsoft excel, determine
answer 1.3 only thanks 
1.3 Explain in detail the process by which water gets "Hard" (formation of hard water). (5) 1.4 Using Microsoft excel, determine and plot BOD graphs after x days given ultimate BOD of 280 mg/L. NB make sure you attach excel sheet with all the data inputs and the BOD) vs toranhs (Don't inst nut the oranh which I don't know how you got it, how Step by Step Solution
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Introduction to Chemical Engineering Thermodynamics
Authors: J. M. Smith, H. C. Van Ness, M. M. Abbott
7th edition
71247084, 978-0071247085
