객관식
Which statement is generally true about CaCl_2?
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1. Intro to General Chemistry
Chemical Properties
객관식
Which of the following is NOT a form of precipitation in chemical reactions?
A
Production of an insoluble compound in water
B
Evolution of a gas during a reaction
C
Formation of a solid from two aqueous solutions
D
Appearance of a cloudy suspension in a solution
검증된 단계별 안내1
Understand that precipitation in chemical reactions refers to the formation of a solid (precipitate) when two aqueous solutions react and produce an insoluble compound.
Identify that 'Production of an insoluble compound in water' describes the formation of a precipitate, which is a classic example of precipitation.
Recognize that 'Formation of a solid from two aqueous solutions' also describes precipitation, as it involves the creation of a solid from dissolved ions.
Note that 'Appearance of a cloudy suspension in a solution' indicates the presence of tiny solid particles suspended in the liquid, which is consistent with precipitation.
Realize that 'Evolution of a gas during a reaction' is not a form of precipitation because it involves the release of a gas, not the formation of a solid precipitate.
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