Chap 1: Experimental Chemistry Flashcards
What measures time?
Digital Stopwatch & Analogue stopwatch
Accuracy of a digital stopwatch
0.01s
Convert 1 Kelvin to degree Celsius
-273 degree Celsius
What measures length
metre ruler and measuring tape
1m can be converted to________
10dm, 100cm, 1000mm
1 tonne is _____kg
1000kg
what measures mass
electronic balance & beam balance
what measures volume
pipette, volumetric flask, measuring cylinder, burette
1m^3 is _________cm^3
1 000 000cm^3
pipette measurement
fixed volumes of 10.0cm^3 or 25.0cm^3
volumetric flask measurement
fixed volumes larger than 100cm^3 or 250cm^3
measuring cylinder measurement
range of volumes to the nearest 0.5cm^3
burette measurement
range of volumes to nearest 0.05cm^3
Parallax error occurs when ____________
eye is not position directly at the meniscus
what measures volume of gases
gas syringe(up to 100cm^3)
Methods to collect gases
water displacement, upward delivery, downwards delivery
gases suitable for water displacement
insoluble in water, density does not affect gas collection
gases suitable for downward delivery
soluble/insoluble doesn’t matter, denser than air
gases suitable for upwards delivery
soluble/insoluble doesn’t matter, less density than air
Methods to dry gases
concentrated sulfuric acid, quicklime(calcium oxide), fused calcium chloride
Gases suitable for concentrated sulfuric acid
gases that are unreactive to sulfuric acid
gases suitable for quicklime
gases must react with calcium oxide
gases suitable for calcium chloride
gases must not react with calcium chloride
