Physical, Chemical changes etc.
In the first 10 seconds of the "Part 1" video there are two substances in two different test tubes. Name two physical properties of one substance in the first sentence of your answer. Name two phyical properties of the other substance in the second sentence of your answer.
When one substance was added to the other substance, was there a physical change or chemical change?
What evidence leads you to believe that it is a physical change or chemical change?
State 1 extensive property used in the experiment that describes the new product?
Rewatch the video and record the mass of the two substances, test tubes, and beaker at the beginning of the video and then record the mass of the substance(s), test tubes, and beaker at the end of the video. Did the mass increase, decrease, or stay the same?
Why do you think that happened to the mass?
Draw a "before mixing" particle diagram and an "after mixing" particle diagram. Particle diagrams were what you were working with on your tickets.
When one substance was added to the other substance, was there a physical change or chemical change?
Name two intensive properties in this experimnet describing the product?
Rewatch the video and record the mass of the two substances, beaker, and dropper bottle at the beginning of the video and then record the mass of the substance(s), beaker, and dropper bottle at the end of the video. Did the mass increase, decrease, or stay the same?
Why do you think that happened to the mass?
Draw 2 particle diagrams representing a situation AFTER the mixing took place. The first should represent a mixture using cold water and the second the water used was hot water.
When one substance was added to the other substance, was there a physical change or chemical change in "Part 3" video?
What evidence leads you to believe that it is a physical change or chemical change?
Was the system in the video an open system or closed system and why do you think that?
Rewatch the video and record the mass of the two substances, test tubes, and beaker at the beginning of the video and then record the mass of the substance(s), test tubes, and beaker at the end of the video. Did the mass increase, decrease, or stay the same?
Why do you think that happened to the mass?
Draw a before mixing particle diagram and an after mixing particle diagram.
State the law of conservation of mass.
An atom is
Which of the following is NOT a physical change?
If a mixture is uniform in composition it is said to be
Which of the following is not a chemical change?
An apple turning brown after being cut is an example of a __________ change.
Heat is applied to an ice cube. Eventually only steam is present. Draw a molecular level representaion of the process.
What happens to the size of the molecules in the above example?
What happens to the total mass of the sample?
Which of the following is a homogeneous mixture?
Which of the following would be classified as an element?
Describe (using laboratory procedure and names of equipment) how you would go about seperating a mixture of salt, sand, gravel, and water.