Question

period:
soluble or insoluble in water:
cooking oil
sugar
soap
dirt
salt
ionic compounds
circle the solute and underline the solvent.
salt water
sugar water
a solution of 20% hcl and 80% water.
chocolate milk
rubbing alcohol: 60% alcohol; 40% water.
solution (so), suspension (p), or colloid (c)?
it settles
doesnt settle or scatter light
scatters light, but doesnt settle
can be filtered
homogeneous at molecular level
particles sometimes visible

1. solution
2. alloy
3. dissolve
4. suspension
5. colloid
6. insoluble
7. homogeneous

a. when a substance cannot be dissolved into a solution.
b. a mixture that is the same throughout.
c. a mixture of two metals.
d. a mixture that is homogeneous at the molecular level.
e. when a solute seems to disappear into a solution.
f. a mixture that scatters light and the particles do not settle.
g. a temporary mixture; the particles will eventually settle.

1. tyndall effect
2. supersaturated
3. saturated
4. solute
5. unsaturated
6. solvent
7. dilute

a. to lessen the concentration of a solution (add solvent).
b. when a solution can hold more solute.
c. when a solution cant hold more solute.
d. when a solution has more solute than it can hold.
e. the part of the solution that dissolved.
f. the scattering of light in a colloid.
g. what is doing the dissolving.

Explanation:

Part 1: Soluble or Insoluble in water

Step1: Classify solubility in water

Cooking oil: Nonpolar, insoluble in polar water.
Sugar: Polar, dissolves in water.
Soap: Has polar/nonpolar ends, soluble.
Dirt: Heterogeneous, insoluble.
Salt: Ionic, dissolves in polar water.
Ionic compounds: Most are soluble in polar water.

Step1: Identify solute (minor component)

Solute = substance dissolved; solvent = dissolving medium.

Step2: Mark solute/solvent for each mixture

Salt water: Solute = Salt; Solvent = Water
Sugar water: Solute = Sugar; Solvent = Water
20% HCl/80% water: Solute = 20% HCl; Solvent = 80% water
Chocolate milk: Solute = Chocolate solids; Solvent = Milk
Rubbing alcohol (60% alcohol/40% water): Solute = 40% water; Solvent = 60% alcohol (higher % is solvent)

Step1: Match property to mixture type

Settles = Suspension; No settle/scatter = Solution; Scatters light/no settle = Colloid; Filterable = Solution; Homogeneous molecular = Solution; Visible particles = Colloid

Answer:

Cooking oil: Insoluble
Sugar: Soluble
Soap: Soluble
Dirt: Insoluble
Salt: Soluble
Ionic compounds: Soluble (most)

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Part 2: Circle the solute and underline the solvent