Matter Station Answers

Title: Intensive/Extensive Notes

• Will the type of plastic your chose float in water?

– If it’s density is less than water: Yes (black blocks)

– If it’s density is more than water: No (clear blocks)

• Will it float in liquid gold? – Yes! Gold is a lot denser than plastic

Title: Intensive/Extensive Notes

• Intensive vs Extensive – Density is an INTENSIVE property.– Mass is an EXTENSIVE property.

• How can you determine whether a property is intensive or extensive?

– Measure properties when you have different masses/volumes of the substance and see if they are the same

Title: Intensive/Extensive Notes

• Explain raisin phenomenon using density.

– Bubbles stick to raisin, changing its density to something less than 1.0 g/mL.

– The raisin floats to the top– The bubbles pop– The raisin’s density goes back to normal

and it sinks

Mixture Classification Practice

A) Beans

B) Wax

C) Steel wool

D) Sand, iron, H2O

E) Water

F) Copper

G) Oil and water

H) Copper Sulfate + H2O

A)Heterogeneous mixture

B)pure substance

C)Homogeneous mixture

D)Heterogeneous mixture

E)Compound/Pure Substance

F)Element/Pure Substance

G)Heterogeneous mixture

H)Solution

Title: Mixture Classification Practice

I) Styrofoam

J) Sand

K) PbI2 + KNO3

L) Salt

I) Homogeneous mixture (air and some other compound)

J) Homogeneous mixture or compound if it’s just SiO2

K) Heterogeneous mixture

L) Compound/Pure Substance

Mixture Classification PracticeA) S and Fe

B) Sodium Bicarbonate

C) Sodium Metal

D) Chlorine Gas

E) Copper Sulfate in H2O

F) Silver chloride in H2O

G) Copper Sulfate crystal

H) NaCl in H2O

I) Nickel and tin alloy

A)Mixture

B)Compound

C)Element

D)Element

E)Mixture/Solution

F)Mixture

G)Compound

H)Mixture/Solution

I) Mixture/Solution

Mixture Classification Practice

• Mixtures and Pure Substances are opposites

• Pure substance can be elements or compounds

Properties of Elements

Element Physical Property

Chemical Property

Uses

Properties of Elements

• Physical properties can be tested w/o changing the substance

• Chemical properties can only be tested by changing the substance

Title: Separating liquids

• Description Separatory Funnel– Tear dropped shape container with valve at

bottom– Place two liquids that don’t mix in funnel– Use valve at bottom to extract the most dense

and close valve just before the other liquid comes out

• Physical Property: – Density & Solubility

Title: Separating liquids

• Distillation Apparatus– Liquid evaporates, gas moves to condensing

tube where it condenses.– Substance with higher boiling point is left in

flask

• Physical Property used?– Boiling point

Title: Separating liquids

• Chromatography– Water moves up the filter paper via capillary action– Components of substance separate as the substance

moves up the filter paper

• Mobile Phase – Water

• Stationary Phase– Filter paper

Title: Separating liquids

• Physical Property used in chromatography?

– Solubility

• How is chromatography different from the other two techniques?

– Substances aren’t in separate containers– Some kinds of chromatography will separate

them, though

Title: Separating Solids

– Mass Iron added to sand 6.05g– Mass Iron removed from sand 6.35 – Difference between a and b: 0.30 g– Percent error = 0.30/6.05*100 =4.9%

• Description of separation technique– Use magnet to get iron out

• Physical property it uses– magnetism

Title: Separating Solids

• Salt and pepper separation– Separate through static electricity– Rub balloon to generate charge, use charged

balloon to attract charged pepper

• Physical property used?– Charge

Title: Separating Solids

• Gravity filtration– Filter paper folded to fit in funnel– Mixture poured into funnel– Larger particles stay in filter paper, while

liquid goes through

• Physical property used?– Solubility and Particle Size