Limiting Reactant and Excess Reactant Calculations
Chemistry ⇒ Stoichiometry and Chemical Calculations
Limiting Reactant and Excess Reactant Calculations starts at 11 and continues till grade 12.
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A mixture of 10.0\,\mathrm{g} of Ca and 10.0\,\mathrm{g} of O_2 reacts to form CaO. The balanced equation is 2\mathrm{Ca} + \mathrm{O}_2 \rightarrow 2\mathrm{CaO}. (Molar masses: Ca = 40.0\,\mathrm{g/mol}, O_2 = 32.0\,\mathrm{g/mol}) Which is the limiting reactant?
A reaction between 8.0\,\mathrm{g} of CH_4 and 32.0\,\mathrm{g} of O_2 produces CO_2 and H_2O. Which is the limiting reactant? (Molar masses: CH_4 = 16.0\,\mathrm{g/mol}, O_2 = 32.0\,\mathrm{g/mol})
A reaction has the equation 2A + B \rightarrow 3C. If you have 4\,\mathrm{mol} of A and 1\,\mathrm{mol} of B, which is the limiting reactant?
A reaction has the equation 2\mathrm{Fe} + 3\mathrm{S} \rightarrow \mathrm{Fe}_2\mathrm{S}_3. If you have 5.6\,\mathrm{g} of Fe and 8.0\,\mathrm{g} of S, which is the limiting reactant? (Molar masses: Fe = 56.0\,\mathrm{g/mol}, S = 32.0\,\mathrm{g/mol})
A reaction has the equation 2\mathrm{K} + \mathrm{Br}_2 \rightarrow 2\mathrm{KBr}. If you have 0.5\,\mathrm{mol} of K and 0.3\,\mathrm{mol} of Br_2, which is the limiting reactant?
A reaction has the equation \mathrm{C} + \mathrm{O}_2 \rightarrow \mathrm{CO}_2. If you have 12.0\,\mathrm{g} of C and 32.0\,\mathrm{g} of O_2, which is the limiting reactant? (Molar masses: C = 12.0\,\mathrm{g/mol}, O_2 = 32.0\,\mathrm{g/mol})
A student mixes 5.0\,\mathrm{g} of NaCl with 7.0\,\mathrm{g} of AgNO_3 in the reaction: \mathrm{NaCl} + \mathrm{AgNO}_3 \rightarrow \mathrm{AgCl} + \mathrm{NaNO}_3. Which is the limiting reactant? (Molar masses: NaCl = 58.5\,\mathrm{g/mol}, AgNO_3 = 170\,\mathrm{g/mol})
If 10.0\,\mathrm{g} of H_2 reacts with 80.0\,\mathrm{g} of O_2 in the reaction 2\mathrm{H}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{H}_2\mathrm{O}, what is the limiting reactant? (Molar masses: H_2 = 2.0\,\mathrm{g/mol}, O_2 = 32.0\,\mathrm{g/mol})
In a reaction, 10.0\,\mathrm{g} of A reacts with 20.0\,\mathrm{g} of B to form C. If the balanced equation is \mathrm{A} + 2\mathrm{B} \rightarrow \mathrm{C}, and the molar masses are A = 10.0\,\mathrm{g/mol}, B = 5.0\,\mathrm{g/mol}, which is the limiting reactant?
In a reaction, 2.0\,\mathrm{mol} of A reacts with 3.0\,\mathrm{mol} of B according to the equation \mathrm{A} + 2\mathrm{B} \rightarrow \mathrm{C}. Which is the limiting reactant?
In a reaction, 3.0\,\mathrm{mol} of X reacts with 4.0\,\mathrm{mol} of Y according to the equation \mathrm{X} + 2\mathrm{Y} \rightarrow \mathrm{Z}. Which is the limiting reactant?
In the reaction 2\mathrm{Al} + 3\mathrm{Cl}_2 \rightarrow 2\mathrm{AlCl}_3, if you have 5.0\,\mathrm{g} of Al and 10.0\,\mathrm{g} of Cl_2, which is the limiting reactant? (Molar masses: Al = 27.0\,\mathrm{g/mol}, Cl_2 = 71.0\,\mathrm{g/mol})
In the reaction 2\mathrm{H}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{H}_2\mathrm{O}, if you have 3 moles of H_2 and 2 moles of O_2, how many moles of water can be formed?
In the reaction 2\mathrm{H}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{H}_2\mathrm{O}, if you have 4 moles of H_2 and 2 moles of O_2, which is the limiting reactant?
In the reaction 2\mathrm{SO}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{SO}_3, if you start with 5.0\,\mathrm{mol} SO_2 and 2.0\,\mathrm{mol} O_2, which is the limiting reactant?
In the reaction \mathrm{N}_2 + 3\mathrm{H}_2 \rightarrow 2\mathrm{NH}_3, if you start with 1 mole of N_2 and 2 moles of H_2, which is the limiting reactant?
