Question

name: tanahah grey
date: 11/17/25
p:3
types of mixtures and methods for separating
chemistry i canvas course lesson 3.3
questions:

1. a food technician needs to separate a homogeneous solution of sugar water. he decides to use distillation to complete his task. which property is utilized to support this method of separation?

a) melting point b) boiling point c) ionization d) density

1. the image below shows a shirt found at a crime scene. observe the ink stain on the pocket. csi agents feel that if they have information related to the pigments in the ink it may provided a clue. how is chromatography used to separate the pigments in the ink?

a) the shirt with the stain is placed in the sun so that the heat separates the different colors based on their boiling points
b) the ink is heated to the boiling points of the different ink pigments then cooled allowing for the isolation of the pigments.
c) a solvent is used to dissolve the ink solutes so that as they wick up a strip of filter paper the pigments separate.
d) the ink is pushed through filter paper allowing the pigments to separate.

1. the components of mixtures, whether homogeneous or heterogeneous, can be separated using different techniques. which of the following mixtures are best separated by filtration?

a) beans in water b) sweetened tea
c) salt water d) chocolate cookie

1. a mixture contains 2 substances with the following properties.

which method would produce the purest liquids?
a) chromatography b) filtration c) distillation d) evaporation

1. which of the following statements accurately explains a method for separating mixtures?

a) distillation utilizes melting point b)filtration is used to separate larger particles from liquid
c) evaporation involves removing heat energy from a liquid d) chromatography reveals the quantity of each mixture component

Explanation:

1. Distillation separates mixtures based on differences in boiling points. Sugar water is a homogeneous solution. When heated, water (with a lower boiling point compared to sugar which doesn't vaporize easily in this context) vaporizes and then condenses, leaving sugar behind. So, boiling point is the property used.
2. Chromatography works by having a solvent carry the solutes (ink pigments) up a filter paper. Different pigments have different affinities for the solvent and the paper, so they separate as they move up. Option c describes this process correctly. Option a is incorrect as heat from the sun isn't the typical chromatographic method. Option b describes distillation - like heating based on boiling points. Option d is too vague compared to the actual chromatographic process.
3. Filtration is used to separate a solid - liquid mixture where the solid is insoluble. Beans in water: beans are solid and insoluble in water, so filtration can separate them. Sweetened tea: sugar is dissolved (homogeneous), so filtration won't work. Salt water: salt is dissolved (homogeneous), filtration not applicable. Chocolate cookie: it's a solid mixture, not a solid - liquid mixture for simple filtration.
4. Distillation is suitable for separating liquid - liquid mixtures based on boiling point differences. Chemical 1 has a boiling point of \(95^{\circ}C\) and Chemical 2 has \(45^{\circ}C\). By heating the mixture, Chemical 2 (lower boiling point) will vaporize first, then can be condensed to get pure Chemical 2. Then Chemical 1 can be obtained similarly. Chromatography is more for separating based on affinity for a mobile and stationary phase (not the best for liquid - liquid here). Filtration is for solid - liquid. Evaporation would leave one component (if we evaporate one liquid, but distillation is a more refined method for liquid - liquid separation here).

5.

• Option a: Distillation uses boiling point, not melting point.
• Option b: Filtration has small pores in the filter. Larger solid particles (insoluble) are retained on the filter, and the liquid passes through. So, it separates larger particles from liquid.
• Option c: Evaporation involves adding heat (e.g., heating a liquid to turn it into vapor), not removing heat.
• Option d: Chromatography shows the separation of components based on their movement, but not directly the quantity (quantitative analysis is a different step usually).

Answer:

1. B. Boiling point
2. C. A solvent is used to dissolve the ink solutes so that as they wick up a strip of filter paper the pigments separate.
3. A. Beans in water
4. C. Distillation
5. B. Filtration is used to separate larger particles from liquid