QUANTITATIVE DETERMINATION OF SODA ASH COMPOSITION BY DOUBLE INDICATOR INDICATOR TITRATION J. OLIVEROS1 1
INSTITUTE OF BIOLOGY, COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES, DILIMAN, QUEZON CITY 1101, PHILIPPINES
DATE SUBMITTED: 4 MARCH 2015 DATE PERFORMED: 27 FEBRUARY 2015
DISCUSSION 1.Why the d!t""ed #$te% t& 'e (!ed ) th! e*+e%,e)t )eed t& 'e '&"ed It #$! '&"ed t& /et %d & the $%'&) d&*de th$t #$! &%/)$""y &()d ) the #$te%. Th! $%'&) d&*de ,$y %e$t+%&3de %e$t+%&3de e%%&)e&(! e%%&)e&(! %e!("t! "et #th) the !y!te, & tt%$t&). Th! ! 'e$(!e $%'&) d&*de d!!&"3ed ) #$te% ,$y &%, $%'&) $d. Th! &,+&()d ,/ht %e$t #th the '$!e &,+&)e)t! & !&d$ $!h. 2. Why ! $ ,*t(%e & $OH $)d $HCO 6 )&,+$t'"e OH %&, $OH $)d HCO 6 %&, $HCO 6 #&("d %e$t %e$t #th e$h &the% : OH HCO 6 88 H2O CO6 2 Th! %e$t&) #&("d $(!e $ de%e$!e de%e$!e &) '&th OH $)d HCO HCO6 &)e)t%$t&) $)d +%&d(t&) & $%'&)$te &)! #hh $) $"te% the 3&"(,e! & the HC9!t$)d$%d . 6. Why ! the%e $ )eed t& '&" the !&"(t&) 'e&%e %e$h)/ %e$h)/ the ,ethy" &%$)/e e)d+&)t The%e ! $ )eed t& '&" the !&"(t&) &% the %e$t&) & the tt%$t&) t& &'t$) the ,& th$t $,! t& )e(t%$";e the HCO 6 "e$d! t& the &%,$t&) & $%'&) $d #hh $) $"te% the &"&% & the !&"(t&) #th the ,ethy" &%$)/e )d$t&% $)d ) &%de% t& /et %d & the $%'&) $d t )eed! t& 'e '&"ed. 4. Wh$t $%e the '$! &,+&)e)t! The d$t$ &'t$ &'t$)ed )ed !(++&% !(++&%tt the $!!(,+ $!!(,+t& t&) ) th$t th$t the !&d$ !&d$ $!h &,+&)e) &,+&)e)t! t! $%e $%e $HCO 6 $)d $2CO6. The The t# t#& 3&" 3&"(, (,e e! ,& $)d +h $%e the&%et$""y e<($"!,"$% ) the tt%$t&) & $ 2CO6. The %e$!&) &% th! ! 'e$(!e the +h & HC" th$t )e(t%$";e! the $%'&)$te &) )t& $ '$%'&)$te &) $)d the ,& ! (!ed t& )e(t%$";ed the !$,e )(,'e% & ,&"e! & the '$%'&)$te &). I) the e*+e%,e)t the ,& &'t$)ed ! /%e$te%th$) +h #hh ,e$)! ,e$)! the%e the%e $%e $%e ,&%e ,&%e '$%'&)$ '$%'&)$te te &)! ) the !&"(t&) !&"(t&) th$) $%'&)$te $%'&)$te &). Th! !(//e!t! th$t! $HCO6 $ '$!e th$t $) !(++"y '$%'&)$te &)! ! $"!& +%e!e)t ) the !&d$ $!h
5. P&!!'"e !&(%e! & e%%&%! E%%&%! ,$y 'e &()d $)d $<(%ed 'y ()e%t$)te! ) the ,e$!(%e,e)t! & the &,+&)e)t! ) the e*+e%,e)t. U)e%t$)te! ) ,e$!(%e,e)t! & the !&"(t&)! $) $(!e $) )%e$!e &% de%e$!e de%e$!e ) the )eeded 3&"(,e & the !&"(t&)! $)d $) h$)/e the %e!("t! ) the $)$"y!! & !&d$ $!h. E%%&%! ) %e$d)/ the 3&"(,e & the tt%$)t (!ed $) $(!e e%%&%! ) the $"("$ted HC" &)e)t%$t&)!. A)&the% !&(%e & e%%&% ! the dete%,)$t&) & the e)d+&)t & the tt%$t&) !)e t #$! '$!ed &) the &"&%
h$)/e 'e$(!e & th! )e3t$'"e h(,$) e%%&% $) 'e $t +"$y the &'!e%3e%! &("d h$3e $!!(,ed th$t the e)d+&)t #$! %e$hed e$%"e% th$) the e*$t t,e $)d !&,e &("d h$3e !ee) $) e%%&)e&(! +)= &"&%. Th! $) )%e$!e the ,&"$%ty & the HC". The d!!&"3ed $%'&) d&*de $) $"!& 'e $ !&(%e & e%%&% 'e$(!e t $) )te%e%e #th the ,ethy" &%$)/e &"&% th(! )%e$!)/ the ,&"$%ty & the tt%$)t.
