(Oh) 2.4.2 Mol Of Ca3p2
Assessment:
Answer the following item with the appropriate response. 1. What is a mole ratio? 2. What piece of information is needed to convert grams of a compound to moles of the same compound? 3. Phosphine (PH3) can be prepared by the hydrolysis of calcium phosphide, Ca3P2:
Ca3P2 + 6 H2O 3 Ca (OH)2 + 2 PH3 a) One mole of Ca3P2 produces 2 mol of PH3. b) One gram of Ca3P2 produces 2 g of PH3. c) 3 moles of Ca(OH)2 are produced for each 2 mol of PH3 produced. d) The mole ratio between phosphine and calcium phosphide is
2 mol PH31 mol Ca3P2 e) When 2.0 mol of Ca3P2 and 3.0 mol H2O react, 4.0 mol of PH3 can be formed.
Generalization:Activity: * Let the students work on a group of 3-4 members.
* Give each group the same set of problems* and let them work on it on their working stations before they present it on the board. * Let them work under time pressure. * Check right after presentation of each item. 1. for the reaction 4 FeS + 7 O2 2 Fe2O3 + 4 SO2 a. Calculate the number of moles of Fe2O3 that could be produced from 7.20 moles of FeS b. Calculate the number of grams of SO2 that could be produced from 3.25 moles of oxygen. c. Calculate the number of grams of oxygen that would react with 0.125 g of FeS. d. If 18.5 g of Fe2O3 are produced in a reaction, how many moles of SO2 would be produced? e. Calculate the moles of O2 that would react with 4.3 moles of FeS. 2. in the following equations, determine which reactant is the limiting reactant and which is in excess. a. KOH + HNO3 KNO3 + H2O 16.0 g 12.0 g b. 2 NaOH + H2SO4 Na2SO4 + H2O 10.0 g 10.0 g
Answer the following item with the appropriate response. 1. What is a mole ratio? 2. What piece of information is needed to convert grams of a compound to moles of the same compound? 3. Phosphine (PH3) can be prepared by the hydrolysis of calcium phosphide, Ca3P2:
Ca3P2 + 6 H2O 3 Ca (OH)2 + 2 PH3 a) One mole of Ca3P2 produces 2 mol of PH3. b) One gram of Ca3P2 produces 2 g of PH3. c) 3 moles of Ca(OH)2 are produced for each 2 mol of PH3 produced. d) The mole ratio between phosphine and calcium phosphide is
2 mol PH31 mol Ca3P2 e) When 2.0 mol of Ca3P2 and 3.0 mol H2O react, 4.0 mol of PH3 can be formed.
Generalization:Activity: * Let the students work on a group of 3-4 members.
* Give each group the same set of problems* and let them work on it on their working stations before they present it on the board. * Let them work under time pressure. * Check right after presentation of each item. 1. for the reaction 4 FeS + 7 O2 2 Fe2O3 + 4 SO2 a. Calculate the number of moles of Fe2O3 that could be produced from 7.20 moles of FeS b. Calculate the number of grams of SO2 that could be produced from 3.25 moles of oxygen. c. Calculate the number of grams of oxygen that would react with 0.125 g of FeS. d. If 18.5 g of Fe2O3 are produced in a reaction, how many moles of SO2 would be produced? e. Calculate the moles of O2 that would react with 4.3 moles of FeS. 2. in the following equations, determine which reactant is the limiting reactant and which is in excess. a. KOH + HNO3 KNO3 + H2O 16.0 g 12.0 g b. 2 NaOH + H2SO4 Na2SO4 + H2O 10.0 g 10.0 g