Free Printable Unit 1 study guide: chemical reactions

1.

Which of these are products in the bath bomb reaction?

a)

Sodium Citrate

b)

Carbon Dioxide

c)

Baking Soda

d)

Nitrogen gas

2.

Made of one type of material throughout

a)

Atom

b)

Molecule

c)

Mixture

d)

Substance

3.

when a solid breaks into particles too small to see and it mixes completely in the liquid

a)

Substance

b)

Dissolve

c)

Soluble

d)

Property

4.

Describes a material that can dissolve in a particular substance

a)

Soluble

b)

Insoluble

c)

Substance

d)

Mixture

5.

Describes a material that does not dissolve in something else.

a)

Soluble

b)

Insoluble

c)

Substance

d)

Mixture

6.

a blend of two or more substances

a)

Property

b)

Substance

c)

Mixture

d)

Flammability

7.

A characteristic of a substance that doesn’t change

a)

Matter

b)

Molecule

c)

Atom

d)

Property

8.

How a substance interacts with fire

a)

Substance

b)

Flammability

c)

Conservation of mass

d)

Density

9.

how much stuff is in a space, or the mass of a substance divided by its volume

a)

Density

b)

Flammability

c)

Melting point

d)

Substance

10.

a change in state of matter or shape; nothing new is formed

a)

Density

b)

Matter

c)

Physical Change

d)

Chemical change

11.

When a substance combines with another substance to create something new or a substance is broken apart into new substances.

a)

Density

b)

Flammability

c)

Physical change

d)

Chemical Change

12.

The smallest unit into which matter can be divided and still retain the characterisitc properties of an element

a)

Atom

b)

Molecule

c)

Particle

d)

Substance

13.

Substance(s) at the start of a chemical reaction

a)

Product

b)

Reactant

c)

Substance

d)

gas

14.

Substance(s) at the end of a chemical reaction

a)

Product

b)

Reactant

c)

gas

d)

Substance

15.

Mass is not created or destroyed in a chemical reaction or change; the mass of the reactants always equals the mass of the products.

a)

Law of reduced visibility

b)

Law of Conservation of heat

c)

Law of Conservation of mass

d)

Law of diminished returns

16.

Which of these things are substances?

a)

Corn starch

b)

Baking soda

c)

Bath bombs

d)

Lemonade mix

17.

Which of these are mixtures

a)

Corn starch

b)

Baking soda

c)

Bath bomb

d)

Lemonade mix

18.

Conservation of mass means that the mass of the starting system has to equal the mass of the ending system. 2 students put a small bathbomb in a bowl on a scale and watch it fizz. They notice that the mass at the end is less than the starting mass. Why?

a)

The scale must be broken, because the mass can't change in an open system

b)

The water evaporated. Therefore there was less water and it had less mass.

c)

The gas bubbles have mass. When they left the mass went down.

d)

The bath bomb had mass. As it dissolved the mass of the system went down

19.

What would be the formula for this molecule?

a)

$C_3H_8$

b)

$C_8H_3$

c)

$38CH$

d)

$3C_8H_8$

20.

What is the formula for this molecule?

a)

$C_6H_7O_5$

b)

$876CHO$

c)

$CHO$

d)

$C_6H_8O_7$

21.

How would you write 3 molecules of water?

a)

$H_3O^3$

b)

$3H_2O$

c)

$H_2O_3$

d)

$H_2O3$

22.

Which of these is an example of a physical change we have seen in class

a)

Water boiling

b)

Bath bombs fizzing

c)

Hydrogen putting out a flame

d)

A helium balloon floating

23.

Which of these is an example of a chemical change we've seen in class?

a)

A bath bomb fizzing in water

b)

Oxygen putting out a flame

c)

Water boiling

d)

salt mixing with water

24.

How many molecules of Citric acid are below?

$5NaCO_3$

a)

4

b)

1

c)

5

d)

3

25.

How many atoms of Hydrogen (H) are in 1 molecule of Sodium Citrate?

$Na_3C_6H_5O_7$

a)

3

b)

6

c)

5

d)

7

26.

Chose all of the options that show 1 atom

a)

H

b)

$H_2O$

c)

C

d)

Na

27.

Choose all of the options that show a molecule

a)

$H_2O$

b)

O

c)

C

d)

$CO_2$

28.

Use your properties of some common gases to find the density of helium

a)

1.250 g/L

b)

2.000 g/L

c)

0.090 g/L

d)

0.179 g/L

29.

Use your properties of some common gases to find the boiling point of hydrogen

a)

-196 C

b)

-42 C

c)

-252 C

d)

-186 C

30.

When should you do a density test?

a)

When you need to know if something will catch on fire

b)

When you need to know if something will sink or float

c)

When you need to know the temperature of something

d)

When you need to know when something will turn into a solid

31.

When should you do a flammability test?

a)

When you need to know when something will melt

b)

When you need to know the color of something

c)

When you need to know if something will catch on fire

d)

When you need to know if something will float or sink

32.

When should you do a solubility test

a)

When you need to know if something will dissolve

b)

When you need to know how something acts around fire

c)

When you need to know how dense something is

d)

When you need to know when something melts

33.

Which resources can you use on your test?

a)

Your notebook

b)

Your brain and your memories

c)

Your friends and their notebook

d)

The internet

34.

Your test has how many parts?

a)

1

b)

2

c)

3

d)

4

35.

Which of these is a reactant in the bath bomb reaction?

a)

Baking Soda

b)

Sodium phosphate

c)

Citric Acid

d)

Sodium Citrate

Unit 1 study guide: chemical reactions

Total questions: 35

Worksheet time: 37mins

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