Activity on Chemical Reactions
A. Reactants and Product. Fill in the table below with the Reactants and Product from the chemical reactions below. Below each
number, write the symbol or formula of the reactant and products.
1. Iron reacts with copper sulfate (CuSO4) and forms iron (II) sulfate (FeSO4) and copper.
2. Magnesium combines with oxygen gas (O2) to produce magnesium oxide.
3. Hydrogen peroxide (H2O2) in the presence of manganese dioxide (MnO2) produces water and oxygen gas.
Fill in the table below with the Reactants and Products from the chemical reactions above. Below each number, write the symbol of
formula of the reactant and product.
Reactants and Products
Number Reactant Products
1
B. Post-assessment
MULTIPLE CHOICE: Choose the letter of the correct answer. Write the letter on a separate sheet of paper. Each question is
equivalent to three points.
1. What will happen to iron when mix with copper sulfate solution?
A. The iron becomes shinier B. The iron is coated with rust C. The iron color remains the same D. The iron becomes bluish
2 Which of the following is a chemical reaction?
A. Simply change the form or state of the reactants
B. Create new forms
C. Always produce new substance
D. Create more matter that what they started
3. Which is not an example of chemical reaction?
A. rusting of iron B. burning of wood C. baking of cake D. breaking of glass
4. What is the other term of chemical reaction?
A. physical change B. chemical change C. decomposition D. single replacement
5. Which of the following is not an example of evidence of chemical reaction?
A. Temperature change B. Change of color C. Formation of bubbles D. Change in strain
C. Assessment
Balance the following chemical equation. Write the correct coefficient of the following reactions.
1. ___ H2 + ___ O2 → ___ H2O
2. ___ H2 + ___ Cl2 → ___ HCl
3. ___ Na + ___ H2O → ___ NaOH +___ H2
4. ___ Na + ___ Cl2 → ___ NaCl
5. ___ Fe2O3 + ___ CO → ___ Fe + ___ CO2
6. ___CS2 (l) + ____O2 (g) → ____CO2 + SO2
7. ____SnO2 +______ H2 → ______Sn + _____H2O
8. _____N2 + ________H2 → NH3
9. _____ H3PO4 + _____HCl → _______PCl5 +_______ H2O
10. _____ As + ______NaOH → ________Na3AsO3 + ________H2
D. Post-assessment
MULTIPLE CHOICE: Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper. Each question is
equivalent to three points.
1. Which of the following stands for the symbol(s) written after a formula in a chemical equation?
A. soluble B. solution C. solid D. synthesis
2. In a chemical equation, the symbol that takes the place of the words ‘reacts with’ is a (n)
A. equal sign B. coefficient C. plus sign D. arrow
3. In a chemical equation, the number of molecules of a given substance is indicated by a
A. subscript B. coefficient C. superscript D. reaction number
4. Which of the following is true of a balanced equation?
A. The total number of atoms remains the same.
B. The kinds of atoms remain the same.
C. The total number of molecules remains the same.
D. The number of atoms of each element remains the same.
5. What number should be written in front of Na to balance the equation? Na + MgCl2 → NaCl + Mg?
A. 1 B. 2 C. 3 D. 4
E. Activities
Classify each reaction as synthesis, decomposition, single replacement, double replacement or combustion. The equations are not
balanced.
1. _____NH3 + ____HCl → ____NH4Cl
2. _____Al2S3 → ___Al + ____S
3. _____C4H12 + ___O2 → ____H2O + ____CO2
4. _____Cl2 + ____KBr → ____KCl + ____Br2
5. _____NaOH + _____CuSO4 → _____Na2SO4 + ____Cu(OH)2
F. Post-assessment
Matching Type: Five types of chemical reactions. Match column A with B.
Column A Column B
_____1. A fuel is combined with oxygen to A. Decomposition
produce carbon dioxide and water
_____2. Two compounds create two different B. double displacement
compounds
_____3. Two or more reactants combine to C. Single replacement
form one product
_____4. One reactant is broken down into two D. Synthesis
or more products
_____5. A compound reacts with an element E. combustion
to form new compound and a different element
