True or False:
Almost every thing in the world around us is made of mixtures
What is True
100
True or False: Solutions are a type of heterogenous mixture. Explain your answer
What is False. Solutions are homogeneous mixtures.
100
This does the dissolving and there is more of this too.
What is the solvent.
100
True or False:
As the atomic number increases, the electronegativity also increases.
What is True.
100
In a mixture, the ingredients can have different physical properties and these differences can be used to separate mixtures. Name 3 of these physical properties.
What is color, size, melting point, boiling point, volatility and solubility.
200
Fill in the blank,
A mixture is two or more substances that are _______ mixed but not ________ bonded.
physically
chemically
200
Solutions can be found in these 3 forms.
What is solid, liquid and gas.
200
The substance that dissolves is called this.
What is a solute.
200
If energy is added in the form of heat, will more or less solute be able to dissolve in a solvent?
What is more.
200
The technique used to separate mixtures depends on these two things.
What are chemical and physical properties.
300
When a mixture is the same throughout, it is called this...
What is homogeneous.
300
True or False: A colloid is a heterogenous mixture that has particles that are quite difficult to see individually.
What is True. An example is milk. It seems homogeneous but there are water, protein and fat particles
300
True or False: Solubility is a chemical property and not a physical one.
What is False. Solubility is a physical one.
300
Polarity depends on these two factors.
What is electronegativity and the shape of the molecule.
300
Chromatography separates components of a mixture based on their differences in this.
What is mobility through a solid.
400
Trail mix is an example of what kind of mixture? Why?
What is heterogeneous because it is not the same throughout and each part can easily be separated.
400
What were our butter and baked Alaska experiments representative of? - What type of solutions did we make?
What is a colloid or a solid emulsion and a foam.
400
What is the rule for solubility?
What is like dissolves like.
400
Define hydrophobic and hydrophilic.
What is to fear water and to love water.
400
This separation technique separates components of a mixture based on the difference in their physical size. The pore size plays an important roll is this technique.
What is filtration
500
True or False: The main difference between a homogeneous mixture and a heterogenous mixture is the size of the things that are mixed. Explain your answer
What is True. Homogeneous mixtures are mixed on the molecular level (invisible) and heterogenous mixtures are on a macromolecular scale (visible).
(see page 112)
500
Name 3 of the 5 kinds of colloids.
What are emulsion, solid emulsion, foam, solid foam and aerosols.
500
Name the most important characteristic that determines whether a solute will dissolve in a given solvent.
What is polarity.
500
Explain how a surfactant works to join both hydrophobic and hydrophilic molecules.
What is it has a hydrophilic head and a hydrophobic tail that brings them together in an emulsion.
500
Our Bananas Foster experiment used this technique of separation. Name the technique and the physical properties involved.
What is evaporation. Volatility and boiling point.