Question

Limiting Reactants, Excess Reactant, and % Yield Name H2+Cl2HCI A gaseous mixture containing 7.5 g of H; gas and 9.00 g of Cl2 gas react to form hydrogen chloride gas. а) Which is the limiting reactant? If all the limiting reactant is consumed, how many grams of HCl are produced? How many grams of excess reactant remain un-reacted? b) c) Cl2+3F22CIF Chlorine reacts with fluorine to form gaseous chlorine trifluoride. You start with 50.0g of chlorine and 95.0g of fluorine. a) b) What is the limiting reagent? What is the theoretical yield of chlorine trifluoride in grams? How many grams of excess reactant remain un-reacted? c) 2C H2+5024CO2 +2H:O Oxyacetylene torches used in welding and cutting steel reach temperatures near 2000°C. The reaction involved is the complete combustion of acetylene (C2H2). Starting with 175 g of C:H2 and 500 g of O2 a) Which is the limiting reactant? b) What is the theoretical yield of CO2? c) If 525 g of CO2 is produced, what is the %yield d) Based on the % yicld, how many grams of C2H2 are needed to produce the theoretical mass of CO2? 3Al 3NH4CIO4Al2O3+ AICly + 3NO + 6H20 The space shuttle uses aluminum metal and ammonium perchlorate (NH4CIOa) in its reusable booster rockets. The products of the reaction are aluminum oxide, aluminum chloride, nitrogen monoxide, and steam. A small scale reaction mixture is 5.75 g of Al and 7.32 g of NH4CIO a) Which is the limiting reactant? b) If all the limiting reactant is consumed, how many grams aluminum chloride are produced? c) How many grams of excess reactant remain un-reacted? d) If 1.87 g of aluminum chloride is formed, what is the %yield e) Based on the % yield, how many grams of Al are needed to produce the theoretical mass of aluminum chloride? 93

Answer 1

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Given 7.5gm H₂ and 9.0gm Ch. and H₂ + Cl₂ y 2401 molar mass of H₂ & Cl are 2 & 71 gm respectively from reaction it is clear that 2 gm H₂ reacts with 71 gm Cl, So 7.5 gm H2 reacts with 7-5 gm x 71gm Cl₂ We 29m = 266-25 gm Cla 7 ie here Cl2 is limiting seagent we required 1 266-2.5 gm Cl2 & we have only a goch o 1 formation of HCl depends upon & Clz from reaction it is clear that 71gm C₂ forms 2x 36.5 gm HCl So I gm Ch forms 2x36.5 gm x 9 gm HCl 719m mass of real formed = [9.25 gm Hal] o from reaction it is clear that - Ilgn Cl2 required agm Hz so ggm Cly required 2xg gm H₂ = 0.254gm. 21 mass of H₂ = Given mass-Required mass remain unreached = (7.50 -0.254 gm 7 246 gm ended- CamScanner