purpose:
The purpose of this experiment was to classify soduim, surcose, potassium bromid using solubility, hardness, conduction, and melting point.
Materials:
Goggles potassuim bromide
4 test resistances soduim chloride
3 watch glasses surcose
test pipework rack unidentified solide sample
disttilled water
3 scoopula
1 stiring rod
10 ml graduated cylinder
1 Beaker
low voltage conductivity apparatus
Method:
step1
three test tube should be placed in the test tube rack; they should be pronounced with the following label surcose, NaCL , KBr.
three wach glass should be to a fault marked with same previous label
with scoopula, a small core was added from surcose, NaCL, KBr containers to its respective wash glass.
a cylinder was utilise to meausure 10 ml of dislled water, then poored into each tubes.
with stirring rod , a small amount of each solide on wach glasses, was added into its respective teste tube ( if it has been apply one stirring rod , it should be cleaned before each do).
stiring rod was used to stir the mixture ( if it has been used one stirring rod, it should be cleaned before each use)
the radical in 3 tube should be keept for step 2 ; the rest of the samples on the wath glasses should be keept for step 3
step2
10 ml of the distilled water was poured itn test tube
one by one, the samples were poured into beaker( if it has been used one beaker, it should be clean before each use )
low-voltag conductivity quizzer was put into each solution ( the tester should be cleaned and dried before each use)
step3
the rest of the samples on 3 wach...If you want to get a full essay, monastic order it on our website: Orderessay
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