8/19/2019 Lab Experiment 13 PH of FABRIC

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Lab Experiment 13

pH OF FABRIC

Name: Student idi:

Score: Signature of Lab Tutor: Date:

TO DETERMINE SURFACE & CORE OF pH OF FABRIC

PERFORMN!E O"#E!T$%ES

&pon t'e (ucce((fu) comp)etion of t'i( experiment (tudent( *i)) be ab)e

to:

+i, Determine t'e (urface - core p. of fabric+ii, &(e uni/er(a) p. indicator +MER0, / p'eno)p't'a)ein (o)ution+iii, &nder(tand and u(e p. (ca)e

M!.$NES / MTER$L RE&$ED

• Dropper *it' bott)e

• p. meter and p. (ca)e

• !onica) F)a(2

• .eating (to/e

• Sci((or(

!.EM$!LS RE&$RED

• &ni/er(a) p. indicator +MER0 (o)ution, / p'eno)p't'a)ein (o)ution

• Di(ti))ed *ater

D$S!&SS$ON

p. can be dened a( t'e mea(ure of degree of acidit4 or a)2a)init45 T'e

mo(t con/enient *a4 of ea(ing p. (ca)e5 T'e term p. (ca)e mean(6

minu( )ogarit'm of t'e mo)ar concentration of t'e '4drogen ion pre(ent

in t'e (o)ution5

p. (ca)e range( from 7+maximum acidit4, to 18+maximum a)2a)init4,6

midd)e /a)ue of t'e (ca)e *'ic' i( repre(ent( neutra) point5 T'e acidit4

increa(e( from neutra) to*ard( 7 and a)2a)init4 to*ard( 185On

ca)cu)ating p. of fabric6 it can be ca)cu)ated bot' on (urface and core of

t'e fabric ca))ed (urface and core p. re(pecti/e)45

PRO!ED&RE

Procedure for t'e Surface p.:

• Pour fe* drop( of uni/er(a) p. indicator on t'e (pecimen

8/19/2019 Lab Experiment 13 PH of FABRIC

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• Rub it gent)4 for fe* (econd(

• Ob(er/e co)or c'ange and compare it *it' t'e p. (ca)e

• Note t'e reading(

Procedure for t'e !ore p.:

15 Ta2e appropriate 9uantit4 of *ater ba(ed on fabric to *ater ratio+)i9uor ratio 1:37,

5 !ut fabric into (ma)) piece(35 "oi) t'e di(ti))ed *ater for 17 minute( in t'e conica) ;a(285 Put t'e fabric into ;a(2 and again boi) for 17 minute(

8/19/2019 Lab Experiment 13 PH of FABRIC

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5 >'4 core of p. of fabric i( nece((ar4 to be determined@

 

35 >'at i( t'e p. of a pretreated cotton fabric@

 

F$NL !.E!0 L$ST

15 !)ean 4our mac'iner4 e9uipmentAmateria)( and *or2benc' before 4ou

)ea/e5

5 En(ure t'e rep)acement of a)) e9uipment( to t'eir (pecied (toragearea5

35 Submit 4our an(*er( to 9ue(tion( toget'er *it' 4our data6 ca)cu)ation

and re(u)t before t'e next )aborator4A e9uipment