Density Determination; OfSolidObjects - Sartorius YDK04 Instrucciones De Funcionamiento

Density Determination

Determining Density of Solid Objects
Preparation
 ( thedescriptionusesdistilledwater)
– Alignthecontainerinthecenterofthe
baseplate;thebeamactsasthestopper
attheback�
– Fillwithdistilledwateruptoapprox�
5mmbelowtheedge�
– Addthreedropsofsurfactanttothe
distilledwater�
– Usetheclamptofastenthe
thermometertotheedgeofthebeaker�
– Cleanthesampleholderwithsolvent
(payingparticularattentiontothe
immersedwires)andhookontothe
beam�
Measurement Procedure
Determining the Sample Weight in Air
– Tarethebalance�
– Placethesampleonthebeamweighing
panandweighit�
– MakeanoteoftheweightvalueW(a)�
12 12
Determining the Buoyancy
G = W (a) – W (fl)
– Tarethebalancewiththesampleonthe
beam�
– Laythesampleinthesampleholder
– Makeanoteoftheabsolutevalueof
buoyancyG,withaminussigninfront�
Calculating the Density
– Readoffthetemperature�
– Locatethedensityvalueρ(fl)inthetable
usingthetemperatureyouhavereadoff�
– Calculatethedensityusingthefollowing
formula:
 W(a)∙[ρ(fl)–0�0012g/cm
ρ=
 CorrG
 W(a)andGing;ρ(fl)ing/cm
G=W(a)–W(fl)
1 ) (Ifyouhavetoremovethesampleholder
fromthemeasurementequipmenttodo
this,makesurethatnoadditionalair
bubblesbecomeattachedupon
re-immersionintheliquid;itisbetterto
addthesampledirectlywithforcepsor
similar�)
1 )�
3
]
+0�0012g/cm 3
3