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The minimum mass of mixture of A2 and B4 required to produce at least 1 kg of each product is : (Given At. mass of 'A' = 10 ; At. mass of 'B' = 120) 5A2 + 2B4 → 2AB2 + 4A2B (A) 2120 gm (B) 1060 gm (C) 560 gm (D) 1660 gm The minimum mass of mixture of A2 and B4 required to produce at least 1 kg of each product is : (Given At. mass of 'A' = 10 ; At. mass of 'B' = 120) 5A2 + 2B4→ 2AB2 + 4A2B (A) 2120 gm (B) 1060 gm (C) 560 gm (D) 1660 gm
. . . . . . . . . . . . . . . . . . . .1000g. . . . . .1000g 5A2. . . +. . . 2B4 . . .→. . 2AB2. . +. . 4A2B (20g/mol). . (480g/mol). . .(250g/mol). . .(140g/mol) . . . . . . . . . . . . . . . . . . . 4mol. . . . . . .7.14mol if 4 mol of AB2 is produced then 8 mol of A2B is needed (mole ratio 1 to 2) so we need more A2B to assure a minimum of 1kg for AB2 so AB2 is the limiting product 200g. . . . . .1920g. . . . . . .1000g. . . . . .1120g 5A2. . . +. . . 2B4 . . .→. . 2AB2. . +. . 4A2B (20g/mol). . (480g/mol). . .(250g/mol). . .(140g/mol) 10mol . . . . 4mol . . . . . . . 4mol. . . . . . .8 mol . .|. . . . . . . . |___1 to 1_____| . .|______5 to 2___________.| so you need 200+1920 = 2120 g of a mix of A2 and B4 (2.12kg)
Molar masses of AB2andA2B are 250 g/mol and 140 g/mole respectively.1 kg of AB2 corresponds to 4 moles. It requires 10 mole A2 and 4 mole B4 respectively.1 kg of A2B corresponds to 7.14 mole. It requires 8.9 mole A2 and 3.57 mole B4 respectively.Thus 10 mole A2 (200 g) and 4 mole B4 (1920 g) will produce atleast 1 kg of each product.The minimum mass of mixture required is 200g+1920g=2120g
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