Question
The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 °C and one bar will be released when 0.15g of aluminum reacts?
Solution
The chemical equation for the reaction is
2 Al + 2 NaOH + H20 -> 2 NaAl02 + 3H2 (3 x 22400 mL At N.T.P)
2 x 27 = 54 g.
54 g of Al at N.T.P release
H2 gas = 3 x 22400 0.15 g of Al at N.T.P release
`H_2 " gas" = (3xx22400xx0.15)/54`
= 186.7 mL
N.T.P condition `V_1` = 186.7 mL , `V_2 = ?`
`P_1` = 1.013 bar , `P_2` = 1 bar
`T_1` = 0 + 273 = 273 K, `T_2` = 20 + 273 = 293 K
Accourding to gas equation
`(P_1V_1)/T_1 = (P_2V_2)/T_2` or` V_2 = (P_1V_1T_2)/(P_2T_1)`
`V_2 = (1.013 "bar" xx 186.7 mL xx 293K)/ (1 "bar" xx 273 K)`
= 203 mL
Is there an error in this question or solution?
Solution for question: The Drain Cleaner, Drainex Contains Small Bits of Aluminum Which React with Caustic Soda to Produce Dihydrogen. What Volume of Dihydrogen at 20 °C and One Bar Will Be Released When 0.15g of Aluminum Reacts? concept: Laws of Chemical Combination - Avogadro Law. For the courses CBSE (Science), CBSE (Science)
