Balancing Equations
__Cl2 + __KI --> __I2 + __KCl
What is Cl2 + 2KI --> I2 + 2KCl
The limiting reactant if 5 mol of H2 and 6 mol of O2 react as 2H2 + O2 --> 2H2O
What is H2?
CH4 + 2O2 → CO2 + 2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.
66 grams CO2
What is the formula for finding percent yield?
What is (actual yield / theoretical yield)x 100 = percent yield.
__Cu2 + __S --> __Cu + __S
What is Cu2 + S--> 2Cu + S
The limiting reactant if 7 mol of H2 and 6 mol of O2 react as 2H2 + O2 --> 2H2O.
What is H2?
Given the reaction
Na2S(aq) + 2AgNO3(aq) → Ag2S(s) + 2NaNO3(aq)
How many grams of Ag2S will form when 3.94 g of AgNO3 and an excess of Na2S are reacted together?
2.87 g of Ag2S will be produced from 3.94 g of AgNO3
What is the percent yield if you have an actual yield of 143g of H and a theoretical yield of 167g of H. Calculate to one decimal place.
What is 85.6%.
__CaF2 + __H2SO4 --> __CaSO4 + __HF
What is CaF2 + H2SO4 --> CaSO4 + 2HF
If H2 is the limiting reactant in the reaction 2H2 + O2 --> 2H2O, oxygen would be known as this kind of reactant.
What is "excess reactant"?
MgF2 + Na2O --> MgO + 2 NaF
Given the balanced chemical equation above, how many moles would you need of sodium oxide (Na2O) to make 4.5 moles of NaF?
What is 2.25 moles
If 4.50 g of HCl are reacted with 15.00 g of CaCO3, according to the following balanced chemical equation, calculate the theoretical yield of CO2.
2HCl + CaCO3 → CaCl2 + H2O + CO2
2.71g CO2
2Fe2O3 + C → Fe + 3CO2
You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2? (Hint: calculate theoretical yield of CO2 first)
15.8%
__BaO + __Al --> __Al2O3 + __Ba
What is 3BaO + 2Al --> Al2O3 + 3Ba
DOUBLE JEOPARDY: The mole ratio of silicon carbide to carbon monoxide in SiO2 + C --> SiC + CO. (balance first)
What is 1:2?
For the balanced equation shown below, if 93.8 grams of PCl5 were reacted with 20.3 grams of H2O, how many grams of H3PO4 would be produced?
PCl5 + 4 H2O => H3PO4 + 5 HCl
27.63 grams of H3PO4
Produced from 16 g H2 ( molar mass: 2.01588), the actual yield of H2O (molar mass: 18.0153) is 138 g. What is the percent yield? Round to one decimal place.
2H2+O2=2H2O
What is 96.7%.
__CuSO4 + __KI --> __CuI + __I2 + __K2SO4
What is 2CuSO4 + 6KI --> 2CuI + I2 + 2K2SO4
The limiting reactant if 755 g chromium reacts with an excess of phosphoric acid to form chromium phosphate as follows: 2Cr + 2H3PO4 --> 3H2 + CrPO4.
What is chromium?
Mg(s) + H2O(l) --> MgO(aq) + H2(g)
Given the balanced chemical equation above, how many moles of hydrogen gas (H2) would you produce if 7.8 moles of magnesium reacted with excess water?
What is 7.8 moles of H2
For the balanced equation shown below, if 18.3 grams of C2H5Cl were reacted with 37.3 grams of O2, how many grams of Cl2 would be produced?
4 C2H5Cl + 13 O2 => 8 CO2 + 10 H2O + 2 Cl2
10.1 grams of Cl2
What is the percent yield of the following reaction if 60 grams of CaCO3(100.087) produces 15 grams (actual yield) of CaO(56.0774)? CaCO3→CaO + CO2
What is 44.6% .