Grade 12 Chemistry Calculations Worksheet
This worksheet covers essential chemistry calculations for Grade 12 students, including stoichiometry, concentrations, and gas laws.
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Grade 12 Chemistry Calculations
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Read each question carefully and show all your work. Use appropriate units and significant figures in your final answers.
1. Consider the balanced chemical equation: 2Al(s) + 3Cl₂(g) → 2AlCl₃(s). If you start with 54.0 g of aluminum and excess chlorine gas, what mass of aluminum chloride can be produced?
2. A solution is prepared by dissolving 25.0 g of NaCl in enough water to make a 250 mL solution. The molarity of this solution is M.
3. To prepare 500 mL of a 0.10 M NaOH solution, you would need to dissolve grams of NaOH.
4. A gas occupies a volume of 10.0 L at 27°C and 1.00 atm. If the temperature is increased to 227°C and the pressure increases to 2.00 atm, what is the new volume of the gas?
5.00 L
10.0 L
15.0 L
20.0 L
5. In a chemical reaction, the limiting reactant is the reactant that is completely consumed and determines the maximum amount of product that can be formed.
True
False
Match each term on the left with its correct definition on the right.
6. Molarity
a. The reactant that is completely used up in a reaction.
7. Stoichiometry
b. The amount of solute in a given volume of solution.
8. Limiting Reactant
c. The study of quantitative relationships between reactants and products.
9. Calculate the pressure exerted by 2.0 moles of an ideal gas in a 10.0 L container at 300 K. (R = 0.0821 L·atm/(mol·K))