For this problem, identify the limiting reagent and calculate the grams of Al2O3 obtained in the reaction of 100. grams of aluminum with 70.0 grams oxygen. If 125 grams of Al2O3 is actually produced, what is the % yield. The equations are not balanced. They were balanced in Exercise B. Use those coefficients to do these calculations.
Al + O2→ Al2O3
What is the limiting reagent? ___________________
How many grams Al2O3 will be produced? ___________________
If 120 grams of Al2O3 is produced, what is the % yield. ____________________
Balanced reaction is 4Al + 3O2→ 2Al2O3, the reaction suggests 4 moles of Al reacts with 3 moles of O2 to produce 2 moles of Al2O3.
Atomic weights : Al = 27 g/mole , O= 16, molar mass of Al2O3= 2*27+3*16= 102 g/mole
moles of Al= 100/27= 3.7, O2= 70/32= 2.1875
as per the reaction, molar ratio of Al :O2= 4:3= 4/3 :1= 1.33 :1
actual molar ratio of Al:O2= 3.7:2.1875 = 3.7/2.1875: 2.1875/2.1875= 1.7:1
so excess is Al and all the O2 reacts. hence Oxygen is limiting reactant.
3 moles of O2 produces 2 moles of Al2O3
2.1875 moles of O2 produces 2.1875*2/3= 1.46 moles of Al2O3, mass of Al2O3= moles* molar mass = 1.46*102=148.92 gm This is the theoretical yiled of Al2O3.
actual yield = 100* actual yield/theoretical yield= 100*120/148.92 =80.6%
For this problem, identify the limiting reagent and calculate the grams of Al2O3 obtained in the...
Worksheet 6 - Rev 10 Stoichiometry Exercise D - Stoichiometry 2 (5 points per answer) For this problem, identify the limiting reagent and calculate the grams of CO2 obtained in the reaction of 100.0 grams of C7H12OsN, with 100.0 grams of oxygen. If 125 grams of CO2 is actually produced, what is the % yield. The equations are not balanced. They were balanced in Exercise B. Use those coefficients to do these calculations. C7H12O;N; + O2 CO2 + H2O +...
How many grams of Al2O3 are produced if the reaction starts with 35.0 grams of aluminum? (Assume there is plenty of oxygen present.) 4 Al + 3 O2 → 2 ALO3 5.00 2.59 0.648 66.18
Aluminum oxide (Al2O3) is produced according to the following equation. 4 Al(s) + 3 O2(g) → 2 Al2O3(s) If the reaction occurs with an 82.4% yield, what mass of aluminum should be reacted with excess oxygen to produce 45.0 grams of Al2O3? a. 54.6 g Al b. 37.9 g Al c. 35.1 g Al d. 23.8 g Al e. 28.9 g Al How do we solve this problem
7. Below is the electrolysis of aluminum oxide. How many grams of aluminum oxide is needed to make 60.0 g of aluminum? Al(s) + O2(9) Al2O3(s) electrolysis with 125 g of bromine. Which is the limiting reagent according We were unable to transcribe this image
7. Below is the electrolysis of aluminum oxide. How many grams of aluminum oxide is needed to make 60.0 g of aluminum? Al2O3(s) electrolysis Al(s) + O2(g) SAL2O3 HAL+. 302 60g . 26.98 -2.22 2.22. 1. 11 mol x101.96 = 1.13 40 g of benzene is mixed with 125 g of bromine. Which is the limiting reagent according nhamical reaction below?
If 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al+3O2 yields 2 Al2O3
34) What is the “limiting reagent” in a chemical reaction? Assuming 2 reactants, explain how to calculate/determine the limiting reactant. What is always true and why? 40) Place the following sets of elements in order of increasing size and Explain why they're in that order. [Al, P, Na, Ar], [I, Cl, F, Br] (these are 2 different sets.) 19) Lead and Carbon are in the same column and therefore have the same number of valence electrons. If the electron configuration...
4. Consider the reaction of aluminum and oxygen: Al(s) + O2(g) Al2O3(s) (i). Which is the limiting reactant if we start with 30.0 g Al and 30.0 g O2? (ii). What is the Theoretical Yield for the reaction? (iii). If 25.85 g of Al2O3 was collected at the completion of the reaction (actual yield), what is the % yield for the reaction? 5. (a). A 1.506-g sample of limestone-containing material gave 0.558 g of...
concentration of Ca(OH)2 in the solution! 7. Given the following equation: 2 Nacio3 B 2 NaCl + 3 O2, if 12.00 moles of NaClO3 reacted in the reaction; a) How many grams of O2 produced? B) How many grams of NaCl are produced when 80.0 grams of O2 are produced? 8. Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2A1+ 3C12 → 2AlCl3 a) Identify limiting reagent b) How many grams of aluminum chloride could...
QUESTION 10 What is the theoretical yield of chromium (Cr) that can be produced by the reaction of 12.2 g of Cr2O3 with 3.10 g of aluminum according to the balanced chemical equation below? 2 Al + Cr2O3 - Al2O3 +2 Cr 45.8 QUESTION 11 How many grams of the excess reagent is left after the reaction has gone to completion? QUESTION 12 If the reaction produced a 65.2% yield, how many grams of chromium were produced?