Measuring Apparatus Flashcards
Symbol and SI unit of mass:
m, kg
Apparatus to measure mass:
electronic balance, beam balance
Symbol and SI unit of time:
t, s
Apparatus to measure time:
stopwatch
Symbol and SI unit of temperature:
T, K
Formula of °C in terms of K
K + 273.15 = °C
Apparatus to measure temperature:
mercury-in-glass thermometer, alcohol-in-glass thermometer, thermocouple
Symbol and SI unit of volume:
V, m^3
Apparatus to measure volume:
measuring cylinder, burette, pipette, gas syringe, volumetric flask
Accuracy of a pipette:
up to 25.0cm^3, measure a fixed volume of liquid
Accuracy of a measuring cylinder:
±0.5cm^3
Accuracy of a burette:
±0.05cm^3
Accuracy of an electronic balance:
±0.01g
Accuracy of a stopwatch:
±0.01s
Accuracy of an alcohol-in-glass thermometer:
±0.5°C
State the most suitable apparatus used to:
1) deliver exactly 20.8 cm^3 of a liquid to a container, drop-by-drop
2) deliver exactly 25.0 cm^3 of a liquid to a flask
1) burette
2) pipette
State the 3 methods of gas collection.
Displacement of water, downward delivery, upward delivery
State the property of gas when performing displacement of water.
State 3 gases that can be collected through this method.
The gas is either insoluble in water or slightly soluble in water.
Hydrogen, oxygen
What are the properties of gas when performing downward delivery?
State 3 gases that can be collected through this method.
The gas is soluble in water and denser than air.
Chlorine, carbon dioxide, hydrogen chlorine, sulfur dioxide
What are the properties of gas when performing upward delivery?
State 1 gas that can be collected through this method.
The gas is soluble in water and less dense than air.
Ammonia, hydrogen
State the function of drying agents.
To absorb water/moisture.
