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2nd Six Weeks Warm Up 6
供稿人: Bellman
Read the text and decided which chemical reaction experiment is being described.
During this experiment, two white solids were
combined in a bag.  A red liquid was then added to
them.  All of the chemicals began fizzing and 
creating gas.  The white solids turned into a yellow 
foam and became very warm to the touch.  The title
of this lab was:
Chemical Reactions with Calcium Chloride, Baking
Soda, and Phenol Red
The Cooking Lab
Chemical Reactions with Sodium and Water
Chemical Reactions with Baking Soda and Vinegar
Read the text and decided which chemical reaction experiment is being described.
During this experiment, a purple liquid was added
to another set of chemicals in a chemical tray.
The chemicals in the chemical tray were ammonia, 
baking soda, and vinegar.  All of these chemicals
experienced a color changed when added with the
purple liquid.   The title of this lab was:
Chemical Reactions with Calcium Chloride, Baking
Soda, and Phenol Red
The Color Change Lab
Chemical Reactions with Cabbage Juice
The Mixology Lab
Read the text and decided which chemical reaction experiment is being described.
During this experiment, ammonium thyocianate and 
barium hydroxide were added together in a flask.
A stopper was placed on top of the flask and the two
chemicals were mixed together.  As they mixed, the 
two solids became a liquid, produced a gas, and
became very cold.  The title of this lab was:
Chemical Reactions with White Flakey Solids
Chemical Reactions with Cold Liquids
The Barium Hydroxide Change
Freezer Flask
Mrs. Ruble was doing a demonstration in class.  She began boiling a beaker of water on a hot plate.  Over a period of 5 minutes, students observed steam rising from the beaker and the level of water in the beaker had reduced from 200mL to 100mL.  This isevidence of:
a chemical change 
no change has occurred
a change in the state of matter
there's no way to know what has occurred
3.During a lab experiment, two students observed a faint glow in the beaker.  Their substance began to change color and there was a slight odor detected.They concluded that they had just observed:
a new element being formed
a chemical reaction
an ionic bond between two covalent atoms
8.How many chemical symbols (elements) are represented in the following formula:
            AgHNCaOPbCu
1
 7
11
4
1.Mr. Bellman was doing an experiment.  He mixed two substances together in a beaker and noticed that the beaker became very cold.  Cold enough to form ice crystals on the outside of the beaker.  Mr. Bellman concluded that:
No type of reaction occurred
This may be evidence of a chemical reaction
A physical change occurred
He just discovered how freezers work
Mr. Bellman made some Kool-aid at home last
weekend.  As he mixed the Kool-aid, he noticed
the water changed colors from clear to red.  Since
the water changed colors, Mr. Bellman knows:
a chemical reaction did not happen
a chemical reaction happened
he does not want red kool-aid anymore
the water has changed into a brand new
substance.
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