Chemistry

Density

100

What is the unit of measure for density?

g/ml or g/cm³

200

Find the volume that 35.2 g of carbon tetrachloride (CCl4) will occupy if it has a density of 1.60 g/mL.

22ml

300

A cube of gold (Au) has a side length of 1.55 cm.  If the sample is found to have a mass of 71.9 g, find the density of Au.  

19.3 g/cm³

400

How do you find the volume of irregular shaped objects?

Use a graduated cylinder. Fill to known water level, drop item into the graduated cylinder. Calculate the displacement. 

500

A block of wood has a density of 0.75 g/cm3 and a volume of 120 cm3. What is the mass of the block?

90g

Acids and Bases

100

On the PH scale, what numbers signify an acid?

0-6

200

On the PH scale, what numbers signify a base?

8-14

300

List at least 2 properties of acids

Tastes sour, conduct electricity, corrosive, react strongly with metals, etc.

400

List at least 2 properties of bases

Feels slippery, tastes bitter, corrosive, does not react with metals,etc.

500

What is the reaction between an acid and base called?

Neutralization 

Chemical and Physical Changes

100

Give an example of a physical change

Ice melting, chopping wood, etc.

200

List at least 3 physical properties

color, texture, shape, magnetism, ductility, malleability. 

300

What is the difference between a physical and chemical change?

Physical, the substance is altered but not transformed into another substance. Chemical change is when a new substance is formed

400

List at least 3 signs that a chemical change has occured.

Energy (heat or light), unexpected change in color, production of a gas, production of a precipitate, change in odor.

500

Give an example of a chemical change

Wood burning, baking soda and vinegar, food molding, etc.

Exothermic and Endothermic Reactions

100

Give an example of an endothermic reaction

Cracking an Ice pack

200

What is the difference between reactants and products?

Reactants are what you start with and will undergo a chemical change. Products are new substances that are formed as a result of a chemical reaction.

300

What is an exothermic reaction?

Energy is released, product feels hot

400

What is an endothermic reaction?

Energy is absorbed, product feels cold

500

Give an example of an exothermic reaction

A match being lit, elephant toothpaste, etc.

Properties of Matter

100

What is volume?

The amount of space an object takes up.

200

What is mass?

The amount of matter in an object

300

How are the atoms on a solid arranged?

Tightly packed

400

How are the atoms in a gas arranged?

Far apart

500

What does malleability mean?

The ability to be hammered into thin sheets