Balancing Chemical Equations
Chemistry ⇒ Chemical Reactions and Equations
Balancing Chemical Equations starts at 9 and continues till grade 12.
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See sample questions for grade 9
Balance the following equation: AgNO3 + NaCl → AgCl + NaNO3
Balance the following equation: Al + HCl → AlCl3 + H2
Balance the following equation: C2H6 + O2 → CO2 + H2O
Balance the following equation: C3H8 + O2 → CO2 + H2O
Balance the following equation: CaCO3 → CaO + CO2
Balance the following equation: CH4 + O2 → CO2 + H2O
Balance the following equation: Fe + H2O → Fe3O4 + H2
A student writes the following unbalanced equation for the reaction between aluminum and oxygen: Al + O2 → Al2O3. What are the correct coefficients to balance this equation?
Which of the following equations is NOT balanced? (1) 2K + Cl2 → 2KCl (2) N2 + 3H2 → 2NH3 (3) H2 + Cl2 → 2HCl (4) Na + O2 → Na2O
Which of the following is a balanced chemical equation? (1) H2 + O2 → H2O (2) 2H2 + O2 → 2H2O (3) H2 + 2O2 → 2H2O (4) 2H2 + 2O2 → 2H2O
Which of the following is a reason for balancing chemical equations? (1) To satisfy the law of conservation of mass (2) To make the equation look neat (3) To increase the number of products (4) To decrease the number of reactants
Which of the following is NOT a step in balancing a chemical equation? (1) Change the subscripts of compounds (2) Add coefficients to balance atoms (3) Count the number of atoms of each element (4) Check your work
Fill in the blank to balance the equation: __Na + Cl2 → 2NaCl
Fill in the blank: In a balanced equation, the total mass of reactants is ______ to the total mass of products.
Fill in the blank: The number of atoms of each element must be the ______ on both sides of a balanced chemical equation.
Fill in the blank: The process of balancing chemical equations involves adjusting the ______ in front of chemical formulas.
Is the equation 2Al + 3Cl2 → 2AlCl3 balanced? (Yes/No)
Is the equation 2KClO3 → 2KCl + 3O2 balanced? (Yes/No)
Is the equation 2Mg + O2 → 2MgO balanced? (Yes/No)
True or False: Balancing chemical equations ensures that the law of definite proportions is followed.
