객관식
Why is knowing the melting point of a substance useful to scientists?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- Electron Configurations of Transition Metals7m
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- Ligands10m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
1. Intro to General Chemistry
Physical Properties
객관식
Which physical property is most commonly used to separate a mixture of sand and salt?
A
Electrical conductivity
B
Solubility
C
Magnetism
D
Color
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검증된 단계별 안내1
Identify the components of the mixture: sand and salt.
Consider the physical properties of each component. Sand is generally insoluble in water, while salt is soluble in water.
Understand that solubility refers to the ability of a substance to dissolve in a solvent, such as water.
Use the property of solubility to separate the mixture by adding water, which will dissolve the salt but not the sand.
After dissolving the salt, filter the mixture to separate the sand, then evaporate the water to recover the salt.
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