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INTRODUCTION
This summary was arr anged as a guidel i ne f or t he st udent s t o do a l aborat ory work of General Chemist ry I in f acul t y of Mat hemat ics and Nat ural Science, Yogyakart a St at e Universit y. The aim of t his summary
invol ves:
1. The main t arget :
a. Give t he experiences t o do t he ways of experiment and t he resul t
of observat ion f or t he chemist ry phenomenons. b. Give some il l ust r at ions about t he st udying mat erial .
c. Give t he deeper knowl edge about chemist ry, especial l y about t he
f ramewor k of basic t heory of chemist ry and t he way t o sol ve t he chemist ry probl em.
d. Inst il l awareness of t he correl at ion of various ot her nat ural
sciences and t hei r l imit at ions. 2. Special t arget s:
a. Devel op skil l in st oichiomet ry, bal ance and t he using of energet ics
in chemist ry syst em.
b. Train t o do t he accurat e observat ion.
c. Train skil l t o use t he gl asses inst rument , chemist ry subst ance, and inst rument .
d. Train t o anal yze t he experiment dat a and wr i t e t he report .
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because t hey are usual l y expensive and danger.iii
5. The st udent s must wear a whit e l aborat or y work coat during t he
l aborat ory work.
6. To do t he l aborat ory work t he st udent s must borrow t he equipment
by using t he st udent card.
7. The st udent s do t he pr act ical work ser iousl y t o underst and t he using of t he equipment s and do t hei r report onl y. If t here i s any dif f icul t y t he st udent s can ask t o t he assist ant or t he l ect urer .
8. Af t er f inish t he pract ical work t he st udent s must make a t emporary report which has been gave a signat ur e by t he l ect urer .
9. The st udent s l eave t he room af t er t hey t urn of t he gas crane and
l ading, and t hen cl ean t he t rash.
10.Each of t he st udent s must make a f ormal r eport based on t he dat a
f rom t he t emporary r eport and shoul d be col l ect ed t o t he assi st ant on t he next l aborat ory work.
11.The st udent s, who can’ t at t end t he l aborat ory work on t he schedul e,
wil l be gi ven a chance t o do t he pract ical work on t he Int ermission week, by paying IDR 7. 500 each of t he experiment s. Int ermission week wil l be l imit ed i n t wice maximal l y.
Every single t hing do not included yet in t his rules will be rule
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3. The experiment which produces a danger ous gas f or our heal t hy
shoul d be done in t he acid cupboard or t he out side of t he l aborat ory.
4. If we wil l put i n t he t hermomet er or gl ass pipe in t he hol e of rubber or sponge, wet t ing t he t ool wit h wat er , hol d cl oser t he part which is put in t he wat er by using t he wet cl ot h. Put it in t he gl ass wit h t he t hreaded gl ass.
5. Buret t e l eak
Pour t he l iquid t o t he ot her bowl . Open t he crane buret t e t hen wipe
by using t he f il t er paper or t issue al l t he part of crane. The l iquid pipel ine must not be obst r uct ed by inappropriat e obj ect s. Smear t he
part which i s shaded by usi ng t he Vasel i ne. Put on again t he crane, t urn t o make sure t hat t he Vasel ine is al ready spread evenl y. Just it .
6. Suct ion t he l iquid by using t he appropri at e pipet t e (vol umet ric pipet t e)
The t ip of t he pipet t e must be submerged i n t he l iquid. Suct ion t he
l iquid t il l pass t he l imit sign in a l i ne shape. Dry t he out side part of t he pipet t e t ip which exposure t he l iquid by using t he f il t er paper . Organize t he pipet t e t o st and upr ight and t he l iquid is l ocat ed exact l y
in t he sign. The l iquid is moved i n t he bowl .
7. Weighing
The subst ance t hat measured must not be put on t he bal ance pl at e direct l y, shoul d use t he beaker, bal ance bot t l e, wat ch gl ass, f il t er
