Virtual Lab Assignment (Physical and Chemical Changes)

Virtual Lab Assignment (Physical & Chemical Changes)

Essential Question

How do physical changes differ from chemical changes in matter? What evidence can you observe that shows a chemical change?

Recap!

Station #1

Rusting of Iron (Iron and Oxygen)

Multiple Choice

In Station 1, you saw a rusted nail. The rusting of iron needs

• Hydrogen and Oxygen

• Air and Water

• Air and Gas

Multiple Choice

The rusting of the nail was a

• Physical Change

• Chemical Change

Station #3

Elephant Toothpaste

Multiple Choice

In Station 3, "Elephant Toothpaste,'' what kind of change does the elephant toothpaste demonstration show?

• Physical Change

• Chemical Change

Multiple Choice

In Station 3, "Elephant Toothpaste," what evidence did you observe that made you come to that conclusion?

• Freezing

• Melting

• Rusting

• gas (bubbles)

Station #4

Copper and Nitric Oxide

Multiple Choice

In Station 4, a copper penny reacted with concentrated nitric acid. The copper is getting oxidized to form copper(II) nitrate (the blue compound) while the nitric acid is getting reduced to form nitrogen dioxide gas (the brown gas). Which of the following would lead you to believe it was a chemical change?

• Color Change

• Change in shape

• Change in size

Lab Station #5

Lead Nitrate and Potassium Iodine Solutions

Multiple Choice

When a solution of lead nitrate is poored into a solution of Potassium iodide a solid yellow substance called lead iodide is formed. What is this solid substance called?

• A liquid

• A precipitate

• Rust

Virtual Lab Station #7

Color Changing Milk (food coloring and milk)

Multiple Choice

In "Color changing milk" different food colorings were added to a tray of milk then a cotton swab was twirled in the milk to make some dramatic color patterns. Based on your observations, is this a physical change or chemical change?

• Physical Change

• Chemical Change

Multiple Choice

In the demonstration "Color changing milk" can we use "color change" as evidence that it was a chemical change?

• Yes, color change is ALWAYS evidence of a chemical change

• No, color can be evidence of a chemical change but not when you apply the color. This was a physical change.

Station #8

Silver Nitrate and Hydrochloric Acid

Multiple Choice

In Station 8, a high concentration of silver nitrate was added to Hydrochloric acid. What evidence was there that this was a chemical change?

• rusting

• formation of a precipitate

• light emission

• freezing

Station #9

Ammonium Thiocyanate and Barium Hydroxide Octahydrate

Multiple Choice

In Station 9, ammonium thiocyanate and barium hydroxide octahydrate are combined. Which of the following describes the type of change that occured?

• Physical Change

• Chemical Change

Multiple Choice

In station 9, what evidence could you have used to come to that conclusion?

• Change in size

• Change in shape

• Temperature change

• Formation of a precipitate

Virtual Lab Station #10

Genie in a Bottle

Multiple Choice

In Station 10, "Genie in a Bottle" based on your observations what type of change occured?

• Physical Change

• Chemical Change

Multiple Choice

In Station 10, "Genie in a Bottle" what evidence could be used to point to that change?

• Change in Shape

• Light emission

• Production of a gas

Virtual Lab Station #11

Cold but sublime

Multiple Choice

In Station 11, a pan of boiling water was thrown into the air, evaporating almost instantly. This is an example of a ________

• Physical Change

• Chemical Change

Multiple Choice

In Station 11, boiling water evaporated almost instantly in -45 degree cold. Which of the following statements is true?

• It is a physical change because evaporation is a State of Matter change.

• It is a chemical change because evaporation is a state of matter change

You have completed the Virtual Lab Assignment