Quantitative-Determination-of-Total-Hardness-in-Drinking-Water-by-Complexometric-EDTA-Titration.docx

QUANTITATIVE DETERMINATION OF TOTAL HARDNESS IN DRINKING WATER BY COMPLEXOMETRIC EDTA TITRATION

 J. JUAN1 and K. MENDOA1 1

NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY, COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES, DILIMAN, QUEZON CITY 1101, PHILIPPINES DATE SUBMITTED: 6 APRIL 2015 DATE PERFORMED: 17 MARCH 2015

ABSTRACT

The dri!i" #$%er Hidden Spring, #i%h NH &'NH() *+-%i+ $* .-/er $d EBT Eri+hr+2e B$! T3 $* idi$%+r, i* %i%r$%ed #i%h EDTA e%h4 e%h4ee eedi$ di$2i 2ie%e e%e%r$ %r$$e% $e%i i $id3 $id3 *+-%i *+-%i+ + .4 +25e +25e6+2 6+2e%r e%ri i %i%r$% %i%r$%i+ i+ %+ de%er2i de%er2ie e i%* %+%$ %+%$ h$rde h$rde** ** +r %+%$ %+%$ 2ier$ 2ier$ +%e +%e%7 %7 The EDTA EDTA *+-%i *+-%i+ + i* *%$d$rdi8ed .4 %he 5ri2$r4 *%$d$rd C$CO &  #i%h 9979: 5-ri%47 The re*-%i" $;er$"e 2+$r +e%r$%i+ +< EDTA $<%er %hree &3 %ri$* i* 0700=9 M, #hie %he $-$%ed %i%er i* 07=9& 2" C$CO & 5er 2L +< EDTA7 EDTA7 The ed5+i% #he %he #$%er  *$25e #$* %i%r$%ed #$* +.*er;ed #he %he ++r h$"ed red %+ e$r>.-e7 The %he+re%i$ %+%$ h$rde** +< %he dri!i" #$%er i* ?0@7==9 552 C$CO& #hih #$* +.%$ied