SCIENCE REVIEW ACTIVITY...

©2015 STEM Stork 1

SCIENCE REVIEW ACTIVITY STATION

Recognizing Chemical Formulas

and Equations

Made By STEM Stork

DIRECTIONS FOR USE For the Buyer

Thanks for your purchase! This resource is meant to be an easy-prep review center to help students refresh knowledge, spiral throughout the year, and prepare for testing. This resource is targeted for 8th grade Texas State Standards (TEKS) 8.5.D & 8.5.F, but can also easily be used in any state. Students can work on this activity individually or with a partner. What I love about this resource is that you can just prepare it ahead of time and have a spot in the room where you can direct students that need to review. Read the suggestions for setup below to get the most out of this resource. 1. Print • Print enough double-sided copies of the student recording pages (pages 5 & 6 of this packet) so that you

will have enough for each of your students. • Print enough copies of the vocabulary words and definitions (page 7 of this packet) so that you will have

enough for each of your students—noting that there are two per page. • Print one copy of the “Review Activity Directions” (page 8 of this packet)—this can be done on colored

paper and laminated if desired for long-term use. • Print one copy of the chemical equation cards (page 9 of this packet)-this can be done on colored paper

and laminated if desired for long-term use. • Print one copy of the multiple choice questions page (page 10 of this packet) )—this can be done on colored

paper and laminated if desired for long-term use. • Print one copy of the answer key for your reference or so that students can self-check. • (Optional) Print a copy of the black and white cover page to put on the front of your activity folder or

container 2. Setup Materials • Cut vocabulary sheets in half • Cut out chemical equation and multiple choice questions cards • Make sure that glue and scissors are available. • Organize for ease of use for your students. You can do this in many different ways. In my class, I just

put the materials into a folder and glue the cover sheet onto the outside. Then, I store the materials in a magazine rack. Alternatives would be to put all materials in a tub or a drawer. See the pictures on the next page for organization ideas.

3. Set Student Expectations • Before you use the review center activities with your students for the first time, show the how to use

the resources. Students should be completing four sections: 1) Cut and paste the vocab words in matching pairs, 2) Fill in the blanks with the vocab words, 3) Complete the review activity using the directions page provided, and 4) Answer the multiple choice questions from the cards. Once they have completed one activity, completing another one should be self-explanatory.

• Let students know how you would like them to turn in their completed activity pages. After I check their student pages, I like to let the students keep them as a study guide.

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DIRECTIONS FOR USE Continued….

Setup in Folders (Similar product pictured)

Setup in Tubs (Similar product pictured)

I look forward to great feedback on my TpT store page! If you have any questions, please feel free to email me at [email protected]. I work really hard to make sure this product is up to the highest standards, but if you notice any errors, please contact me right away to let me address the problem before leaving negative reviews. Thanks! This product was created by STEM Stork ©2015. This product is for single classroom use only. If you have enjoyed this product and want to recommend it to your colleagues, please direct them to my TpT store. Thanks!

Thanks for your purchase!

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©2015 STEM Stork 4

SCIENCE REVIEW

ACTIVITY STATION

Recognizing

Chemical Formulas and Equations

VOCABULARY MATCHING Cut out the vocabulary and match them to their correct definition.

Glue the matched word and definition in the space below .

FILL IN THE BLANK Use the vocabulary words from the vocabulary matching section

to fill in the missing information in the passage below

Using the correct notation is very important when working with chemical reactions, so scientists use a standard notation. In order to write a compound, elemental symbols are used to show a ____________________ . In this chemical formula, the number of each type of atoms is shown with a small number to the right of the element symbol called a __________________ . If there is more than one molecule in a chemical formula, this is shown by a large number to the left of the formula called a ___________________ . Chemical reactions are written in shorthand as _______________________ and have two main parts. The __________________ show the substances that go into a chemical reaction and are on the left of the equation. The _____________________ show the substances that are made during a chemical reaction and are on the right side of the equation. When writing a chemical equation, it is very important to know ____________________________________, which states that matter be neither created nor destroyed during a chemical reaction. This means that when you are writing a chemical equation, the two sides of the equation must be balanced. This means that there are equal numbers of each type of atom on both sides of the equation.

Chemical Formulas

& Equations

Name:________________

©2015 STEM Stork 5

MULTIPLE CHOICE Write your answers to the multiple choice questions from the cards in the space below.

REVIEW ACTIVITY Follow the directions on the activity card and record your work below.

# 1 _____________ # 3 _____________

# 2 _____________ # 4 _____________ ©2015 STEM Stork 6

Chemical Formulas

& Equations

Chemical Reaction #1 Chemical Reaction #5

Reactant: ___________________ N: _______ H: _______

Product: ___________________ N: _______ H: _______

Reactant: ___________________ C: _______ O: _______

Product: ___________________ C: _______ O: _______


Reactant: ___________________ P: _______ H: _______ Cl: ______ O:_______

Product: ___________________ P: _______ H: _______ Cl: ______ O:_______

Reactant: ___________________ C: _______ H:_______ O: _______

Product: ___________________ C: _______ H:_______ O: _______


Reactant: ___________________ Fe: ______ C: ______ O: ______

Product: ___________________ Fe: ______ C: ______ O: ______

Reactant: ___________________ C: _______ H:_______ O: _______

Product: ___________________ C: _______ H:_______ O: _______


Reactant: ___________________ Ag: _____ Na: ______ I: ______ S: ______

Product: ___________________ Ag: _____ Na: ______ I: ______ S: ______

Reactant: ___________________ Na: _____ H: ______ P: ______ Cl: ______ O: ______

Product: ___________________ Na: _____ H: ______ P: ______ Cl: ______ O: ______

Balanced Equations Unbalanced Equations

Products The large number to the left of a molecule formula, used to show how many molecules of that type are present

Reactants The symbolic representation of a chemical reaction using chemical formulas to show reactants and products

Coefficient A notation that shows the number and type of atoms present in a molecule

Subscript The first law of thermodynamics that states that matter can neither be created nor destroyed in a chemical reaction

Chemical Formula The substances that result from a reaction, usually written on the right side of an equation

Chemical Equation The small number to the right of an element symbol, used to show how many atoms of that element are present

Law of Conservation of Mass The starting substances in a chemical reaction, usually

written on the left side of an equation

Product The large number to the left of a molecule formula, used to show how many molecules of that type are present

Reactant The symbolic representation of a chemical reaction using chemical formulas to show reactants and products

Coefficient A notation that shows the number and type of atoms present in a molecule

Subscript The first law of thermodynamics that states that matter can neither be created nor destroyed in a chemical reaction

Chemical Formula The substances that result from a reaction, usually written on the right side of an equation

Chemical Equation The small number to the right of an element symbol, used to show how many atoms of that element are present

Law of Conservation of Mass The starting substances in a chemical reaction, usually

written on the left side of an equation

©2015 STEM Stork 7

REVIEW ACTIVITY INSTRUCTIONS

1. Examine the eight chemical equation cards. For each

chemical equation, identify and write down the product and

reactant on your recording sheet.

2. For each chemical equation, identify the number of atoms

of each element in the reactant and product. Record this

information on your recording sheet.

3. Finally, for each chemical equation, classify it on the

T-Chart at the bottom of the page as either balanced or

unbalanced by writing the equation number in the correct

column.

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Chemical Formulas

& Equations

©2015 STEM Stork 9

#1 N2 + 3H2 2NH3

#2 PCl5 +H2O H3PO4 + 5HCl

#3 2Fe2O3 +3C Fe + CO2

#4 2AgI + Na2S Ag2S + 2NaI

#5 CH4 + 2O2 CO2 + 2H2O

#6 6CO2 + 6H2O C6H12O6 + 6O2

#7 8CO + 17H2 C8H18 + H2O

#8 Na3PO4 + HCl 3NaCl + H3PO4

# 1 # 2

# 3 #4

©2015 STEM Stork 10

Chemical Formulas

& Equations

Chemical Formulas

& Equations

Chemical Formulas

& Equations

Chemical Formulas

& Equations

How many atoms are in the reactant of the following chemical equation? SnO2 + 2 H2 → Sn + 2 H2O

A) 2

B) 7

C) 4

D) 6

How many hydrogen atoms are in the molecule below?

H3PO4

A) 7

B) 4

C) 3

D) 10

Which of the following is NOT a balanced chemical equation?

A) 2KNO3 + H2CO3 → K2CO3 + 2HNO3

B) 4NH3 + 5O2 → 4NO + 6H2O

C) 10KClO3 + 3 P4 → 3P4O10 + 10KCl

D) TiCl4 + H2O → TiO2 + 4HCl

Which molecule has twice as many Na atoms as Na2S?

A) 4Na2S

B) 2Na2Cl

C) Na2Cl

D) 2Na4S

VOCABULARY MATCHING Cut out the vocabulary and match them to their correct definition.

Glue the matched word and definition in the space below .

FILL IN THE BLANK Use the vocabulary words from the vocabulary matching section

to fill in the missing information in the passage below

ANSWER KEY

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Chemical Formulas

& Equations

Products The substances that result from a reaction, usually written on the right side of an equation

Reactants The starting substances in a chemical reaction, usually written on the left side of an equation

Coefficient The large number to the left of a molecule formula, used to show how many molecules of that type are present

Subscript The small number to the right of an element symbol, used to show how many atoms of that element are present

Chemical Formula A notation that shows the number and type of atoms present in a molecule

Chemical Equation The symbolic representation of a chemical reaction using chemical formulas to show reactants and products

Law of Conservation of Mass The first law of thermodynamics that states that matter

can neither be created nor destroyed in a chemical reaction

Using the correct notation is very important when working with chemical reactions, so scientists use a standard notation. In order to write a compound, elemental symbols are used to show a ___chemical formula__ . In this chemical formula, the number of each type of atoms is shown with a small number to the right of the element symbol called a ____subscript___ . If there is more than one molecule in a chemical formula, this is shown by a large number to the left of the formula called a ___coefficient____ . Chemical reactions are written in shorthand as ___chemical equations____ and have two main parts. The ____reactants___ show the substances that go into a chemical reaction and are on the left of the equation. The ____products_____ show the substances that are made during a chemical reaction and are on the right side of the equation. When writing a chemical equation, it is very important to know __the Law of Conservation of Mass_____, which states that matter be neither created nor destroyed during a chemical reaction. This means that when you are writing a chemical equation, the two sides of the equation must be balanced. This means that there are equal numbers of each type of atom on both sides of the equation.

MULTIPLE CHOICE Write your answers to the multiple choice questions from the cards in the space below.

REVIEW ACTIVITY Follow the directions on the activity card and record your work below.

# 1 _____B_____ # 3 _____D_____

# 2 _____C_____ # 4 _____B_____

ANSWER KEY


Chemical Formulas

& Equations


Reactant: ___N2 + 3H2_______ N: ___2___ H: ___6____

Product: ______2NH3____ N: ____2___ H: ____6___

Reactant: ___CH4 + 2O2 _____ C: ___1___ H:___4___ O: ___4____

Product: ___CO2 + 2H2O____ C: ___1___ H:___4___ O: ___4___


Reactant: ____PCl5 +H2O_____ P: ___1___ H: ___2___ Cl: __5___ O:___1___

Product: ____H3PO4 + 5HCl___ P: ___1___ H: ___8___ Cl: __5___ O:___4__

Reactant: ___6CO2 + 6H2O___ C: ___6___ H:___12___ O: ___18____

Product: ___C6H12O6 + 6O2_____ C: ___6___ H:__12___ O: ____18___


Reactant: ____2Fe2O3 +3C_____ Fe: ___4__ C: ___3__ O: ___6___

Product: ______Fe + CO2_____ Fe: ___1__ C: ___1__ O: ___2___

Reactant: ___8CO + 17H2___ C: ___8___ H:__34___ O: ___8___

Product: ___C8H18 + H2O____ C: ___8___ H:__20__ O: ___1___


Reactant: _____2AgI + Na2S___ Ag: __2__ Na: ___2__ I: ___2__ S: ___1___

Product: __Ag2S + 2NaI_____ Ag: __2__ Na: __2__ I: ___2__ S: ___1___

Reactant: __Na3PO4 + HCl___ Na: __3__ H: ___1__ P: ___1__ Cl: ___1__ O: ___4___

Product: ___3NaCl + H3PO4____ Na: ___3_ H: ___3__ P: ___1__ Cl: ___3__ O: ___4__

Balanced Equations Unbalanced Equations

#1, #4, #5, #6

#2, #3, #7, #8


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