Question

soluble or insoluble in water: cooking oil insoluble sugar soluble soap insoluble dirt soluble salt soluble ionic compounds soluble
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 suspension doesnt settle or scatter light solution scatters light, but doesnt settle colloid can be filtered suspensions homogeneous at molecular level so particles sometimes visible colloid

1. solution d
2. alloy c
3. dissolve e
4. suspension g
5. colloid f
6. insoluble a
7. homogenous b

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

1. tyndall effect f
2. supersaturated b
3. saturated c
4. solute e
5. unsaturated d
6. solvent g
7. dilute a

to lessen the concentration of a solution (add solvent). when a solution can hold more solute. when a solution cant hold more solute. when a solution has more solute than it can hold. the part of the solution that dissolved. the scattering of light in a colloid. what is doing the dissolving.
circle all of the solutions salt water sugar water drinking water orange juice pure gold steel oil and water soap and water
50 ml of a solvent can hold 80 g of a solute. are the following saturated, unsaturated, or supersaturated? 35 g. 82 g 75 g 80 g 100 g 81 g
a salt solution is too concentrated. how would you dilute it? what will eventually happen to a supersaturated solution? what does it mean when a suspension settles?
which one is more concentrated? a 35% solution or a 46% solution? a supersaturated solution or a saturated solution? thin syrup or thick syrup? a saturated solution or an unsaturated solution? a diluted solution or an undiluted solution?
a liquid is poured onto a piece of metal. later on the metal seems to have softened. a) which is the solvent? b) what is happening to the metal?
what happens if you add more solute to a saturated solution? what happens if you add more solute to a supersaturated solution? what happens if you add more solute to an unsaturated solution.
if the two pictures show what happens to a mixture after a time, what kind of mixture is it and why? before after

Explanation:

Step1: Determine solubility

Cooking oil is non - polar and water is polar, so cooking oil is insoluble in water. Sugar is a polar compound and can form hydrogen bonds with water, so it is soluble. Soap is a large molecule and is insoluble in pure water in the sense of not forming a true solution. Dirt is a mixture and is insoluble. Salt is an ionic compound and is soluble in water due to ion - dipole interactions. Ionic compounds in general are soluble in water because of the attraction between ions and water molecules.

Step2: Identify solute and solvent

In salt water, salt is the solute and water is the solvent. In sugar water, sugar is the solute and water is the solvent. In a 20% HCl and 80% water solution, HCl is the solute and water is the solvent. In chocolate milk, the chocolate particles and other dissolved substances are solutes and milk (mostly water) is the solvent. In rubbing alcohol (60% alcohol; 40% water), alcohol is the solute and water is the solvent.

Step3: Classify mixtures

A suspension settles over time, like a mixture of dirt and water. A solution is homogeneous at the molecular level and doesn't settle or scatter light visibly, like salt water. A colloid scatters light (Tyndall effect) and the particles don't settle, like chocolate milk.

Step4: Match definitions

1. Solution: A mixture that is homogeneous at the molecular level (D).
2. Alloy: A mixture of two metals (C).
3. Dissolve: When something seems to disappear into a solution (E).
4. Suspension: A temporary mixture; the particles will eventually settle (G).
5. Colloid: A mixture that scatters light and the particles do not settle (F).
6. Insoluble: When a substance cannot be dissolved into a solution (A).
7. Homogenous: A mixture that is the same throughout (B).

Step5: Determine saturation

If 50 mL of a solvent can hold 80 g of a solute:

• 35 g is an unsaturated solution (less solute than the maximum capacity).
• 82 g is a supersaturated solution (more solute than the maximum capacity).
• 75 g is an unsaturated solution.
• 80 g is a saturated solution (at the maximum capacity).
• 100 g is a supersaturated solution.
• 81 g is a supersaturated solution.

Step6: Dilution and concentration

To dilute a concentrated salt solution, add more solvent (water). A supersaturated solution will eventually have the excess solute precipitate out. When a suspension settles, it means the solid particles have separated from the liquid due to gravity.

• A 46% solution is more concentrated than a 35% solution.
• A supersaturated solution is more concentrated than a saturated solution.
• Thick syrup is more concentrated than thin syrup.
• A saturated solution is more concentrated than an unsaturated solution.
• An undiluted solution is more concentrated than a diluted solution.

Step7: Liquid - metal interaction

If a liquid is poured on a piece of metal and the metal softens, the liquid is likely the solvent. What is happening to the metal is that it is being dissolved or corroded by the liquid.

Step8: Adding solute to solutions

If you add more solute to a saturated solution, the excess solute will not dissolve and will remain as a solid (precipitate). If you add more solute to a supersaturated solution, the excess solute will quickly precipitate out. If you add more solute to an unsaturated solution, the solute will dissolve until the solution becomes saturated.

Answer:

Solubility: Cooking oil - Insoluble, Sugar - Soluble, Soap - Insoluble, Dirt - Insoluble, Salt - Soluble, Ionic compounds - Soluble
Solute - Solvent: Salt water: Salt (solute), Water (solvent); Sugar water: Sugar (solute), Water (solvent); 20% HCl and 80% water: HCl (solute), Water (solvent); Chocolate milk: Chocolate etc. (solute), Milk (solvent); Rubbing alcohol: Alcohol (solute), Water (solvent)
Mixture classification: Suspension - settles; Solution - homogeneous, no light - scattering; Colloid - scatters light, no settling
Definition matches: 1 - D, 2 - C, 3 - E, 4 - G, 5 - F, 6 - A, 7 - B
Saturation: 35 g - Unsaturated, 82 g - Supersaturated, 75 g - Unsaturated, 80 g - Saturated, 100 g - Supersaturated, 81 g - Supersaturated
Dilution/Concentration: Add solvent to dilute; Supersaturated - excess solute will precipitate; Suspension settling means solid - liquid separation; 46% solution is more concentrated etc.
Liquid - metal: Liquid is solvent, metal is being dissolved/corroded
Adding solute: Saturated - excess solute precipitates; Supersaturated - excess solute precipitates quickly; Unsaturated - solute dissolves