Chemistry for grade 7 IB middle years programme - such as homogenous mixtures, seperating techniques Flashcards
(26 cards)
What is a homogeneous mixture?
A homogeneous mixture is a mixture that has a uniform composition and appearance throughout.
True or False: In a homogeneous mixture, the individual components are easily distinguishable.
False
Give an example of a homogeneous mixture.
Saltwater is an example of a homogeneous mixture.
What is a heterogeneous mixture?
A heterogeneous mixture is a mixture where the individual components are not evenly distributed and can be easily distinguished. composition is not uniform
Which of the following is a separating technique? A) Filtration B) Homogenization C) Synthesis
A) Filtration
Fill in the blank: _____ is a technique used to separate solid particles from a liquid.
Filtration
True or False: Distillation can be used to separate components of a homogeneous mixture based on boiling points.
True
What is the purpose of chromatography?
Chromatography is used to separate and analyze the components of a mixture.
What type of mixture is oil and water?
Oil and water is a heterogeneous mixture.
How does evaporation work as a separating technique?
Evaporation works by turning a liquid into vapor, leaving solid components behind.
Multiple Choice: Which method would you use to separate sand from water? A) Evaporation B) Filtration C) Distillation
B) Filtration
What is the main characteristic of a solution?
A solution is a homogeneous mixture where one substance is dissolved in another.
True or False: You can see the particles in a colloid.
False
What does the term ‘solute’ refer to?
The solute is the substance that is dissolved in a solution.
What is the difference between a solute and a solvent?
The solute is the substance that dissolves, while the solvent is the substance that does the dissolving.
Fill in the blank: _____ is used to separate mixtures based on particle size.
Filtration
What is centrifugation?
Centrifugation is a technique that uses centrifugal force to separate components of different densities in a mixture.
Multiple Choice: Which of the following is NOT a separating technique? A) Distillation B) Synthesis C) Chromatography
B) Synthesis
What kind of mixture is salad dressing (oil and vinegar)?
Salad dressing is a heterogeneous mixture.
True or False: A suspension is a type of homogeneous mixture.
False
What is the process of dissolving called?
Dissolution
Fill in the blank: _____ can be used to separate colors in ink.
Chromatography
What is the boiling point?
The boiling point is the temperature at which a liquid turns into vapor.
What does the term ‘mixture’ mean in chemistry?
A mixture is a combination of two or more substances that retain their individual properties.
