University:
North Central College
Course:
CHEM 121 | General Chemistry I
Academic year:

2021
Views:

170

Pages:

12
Author:

SpaceCadet101

Mole-Mole Stoichiometry Practice Name: Hour: Balance the following equations, then answer the question that follows. 1, __ "2(9> + __ AIC'3(aq) --+ __ AIFJCaq) + __ Cl2(g) How many moles of fluorine gas are needed to produce 2,4 moles of Al�? 2. -- {NH.J,Cr,O, --+ __ Cr,03 + -- H2O + -- Na How many moles of Cr2� ar!l produced when 1,4 moles of (NH.)2Cr20, are decomposed? 3. __ H2SO4 + -- NaOH - -- H2O + -- NazSO. How many moles of NaOH are needed to neutralize 5 moles of H2SO4? 4. __C&H6 + __02 --,. __COz + __H,O How many moles of CO2 gas are produced w)len 0,5 moles of benzene, CsH&, are burned? 5. __Afz(S04)3 + __BaCl2 - _Baso. + __ AI03 How many moles of BaCl2 are needed to produce 4.1 moles of BaSO4? 7 Percent, Actual, and Theoretical Yield 1) LiOH + KCI ➔ LiCI + KOH a) I began this reaction with 20 grams of lithium hydroxide. What is my theoretical yield of lilhlllm chloride? b) I actually produced 6 grams of IHhium chloride. What Is my percent yield? 2) CaH11 + 5 02 ➔ 3 CO2 + 4 H20 a) If I start with 5 grams of C3H8, what is my theoretical yiald of water? b) I got a percent yield of 75% How many grams of water did I make? 3) Be + 2 HCI ➔ BeCl2 + H2 My theoretical yield of beryllium chloride was 10.7 grams. If my actual yield was 4.5 grams, what was my percent yield? 4) 2 NaCl + CaO ➔ CaCl2 + Na2O What Is my theoretical yield of sodium oxide if I start With 20 grams of calcium oxide? 5) FeBr2 + 2 KCI ➔ FeCl2 + 2 KBr a) What is my theoretical yield of iron (II)' chloride, ifl start with 34 grams of iron (II) brornide? b) What is my percent yield of iron (II) chloride If my actual yield is 4 grams? 6) TIS + H2O ➔ H2S + TIO What is my percent yield of titanium (11) oxide if .1 start with 20 grams of titanium (II) sulfide and my actual yield of titanium (II) oxide is 22 grams? 7) U + 3 Br2 ➔ UBre What is my actual yield of uranium hexabromide ifl start with 100 grams of uranium and get a percent yield of 83% ? 8) H2SO4 ➔ H2O + SOa If I start with 89 grams of sulfuric acid and produce 7 .1 grams of water, Whatl s my percent yield? Name _______________ Hour__ Stoichiometry Review **There are no limiting reactant problems on this review but there will be one on your test!** Use the equation below to answer questions 1-3 P4 + 6Cl2 ➔ 4PCl3 1. How many moles of P4 are needed to completely react with 4.3 mole of Cl2? 2. What is the mass of PCl3 produced when 0.45 moles of P4 react with excess Cl,? 3. How many grams of Cl, were used up when 95 grams of PCl3 were produced? 4. Define the following: a. Percent yield b. Experimental yield c. Theoretical yield d. Limiting reactant e. Excess reactant 9 Name._____________ Hour___ Limiting Reagent Practice Answer the following questions given the formula: __ Nz +___ Hz ➔ ___ NH, 1. When 2.5 mol of Nz reacts with 4 moles Hz: a. What is the limiting reagent? b. What is the excess reagent? c. How many moles of NH 3 are produced? 2. When 18 g of Nz reacts with 3.4 g Hz: a. What is the limiting reagent? b. What is the excess reagent? c. What is the mass of NH3 produced? Answer the following questions given the reaction: __CH5OH + __0 2 ➔ ___co,+ ___H,O 1. When 1.8 mol of CH5OH reacts with 2.5 mol of 02: a. What is the limiting reactant? b. What is the reactant in excess? c. How many moles of CO, and H2O are produced? 2. When 25 g of CH5OH reacts with 30 g of 02: a. What is the limiting reactant? b. What is the reactant in excess? c. What is the mass of CO, and H 2O produced? \1..