Experiment and Measurement Flashcards
What is used to measure time?
And what are the SI Units?
Stopwatch or Stop Clock
s (Seconds), m (Minutes), h (Hour)
What is used to measure temperature?
And what are the SI Units?
What is the accuracy?
The mercury temperature
K (Kelvin), degree C (Celsius)
+- 0.5 degree C
What is used to measure mass?
And what are the SI Units?
What is the accuracy?
Beam Balance or Electronic Balance
kg (Kilogram)
0.01 g
What is used to measure volume?
What is the accuracy for each of them?
Beaker, Measuring Cylinder, Burette, Pipette
Beaker = 100 cm^3
Measuring Cylinder = 99 cm^3
Burette = +- 0.1 cm^3
Pipette = 20.0 cm^3 & 25.0 cm^3
When water or a solution is placed in a glass container, it forms a curved surface called a…
Meniscus
A meniscus can be…
Concave or Convex
If the meniscus
Concave = Read the bottom/top of meniscus
Convex = Read the bottom/top of meniscus
Concave = Bottom
Convex = Top
How we collect a gas depends on the physical properties of the gas, namely…
- Solubility = how soluble the gas is in water
- Density = how dense the gas is compared to air
3 Methods of collecting gasses
Displacement of Water, Downward Delivery, Upward Delivery
Displacement of Water is suitable for collecting gasses that are…
What are the examples of gasses that can be collected by this method
Insoluble or slightly soluble in water.
Carbon Dioxide, Hydrogen, or Oxygen
Downward Delivery is suitable for collecting gasses that are…
What are the examples of gasses that can be collected by this method
Soluble in water and denser than air.
Chlorine and Hydrogen Chloride
Upward Delivery is suitable for collecting gases that are…
What are the examples of gasses that can be collected by this method
Soluble in water and less dense than air
Ammonia
When we need to use dry gas in an experiment. We can dry a gas by passing it through a…
Drying agent
Examples of Commonly used drying agents
Concentrated Sulphuric Acid, Quicklime (calcium oxide), and fused Calcium Chloride
