Question

4) Which of the following represents the equation for a second-order half-life? A) +12= B) 412- MA). 9t12-11 D) #12 - TAL E) t12- TALO 5) 5) What is the molar solubility of barium fluoride (BaF2 ) in water? The solubility-product constant for BaF2 is 1.7 x 10-6 at 25°C. A) 75 10-3 B) 1.8 x 10-3 C) 6.5 x 10- 4 D ) 5.7 x 10-7 E) 1.2 x 10-2 6) The second-order decomposition of HI has a rate constant of 1.80 x 10-3 M-1,-1. How much H1 remains after 27.3 s if the initial concentration of HI is 4.78 M? A) 0.258 M B) 2.39 M C) 3.87 M D) 2.20 M E) 4.55 M 6 )

Answer 1

Con sider a Seeond-oveler reaelien 2A Podt Reahon Kete Ke Rate Constant 4P salving the aepue vat ayahen tegh fntegratien with proper limil 4- CULE of A aft t- 14).4riial CawA d teo L Kit 2nd-oyder yeaetion TAI K. 14 14 K LAJ Ans K IA decompostion of hz As The reaction is 2nd-Dder, -3 K= 1.20x10 M'5 t:27.3s L LKt LA1 4.78 M 1-80X10x 27-3 418

0.04914 4 0.2092 M TA1 0.252 3 M 112 Y 3.87 M Ans For BaF we havefollaing uka iu 42 Ba F Ba 2F Kp 1.7x106 20 is SM BaFz 2F 2S Galubikty frodut (s)x (29 4 s3 1.7 X166 1-7 X166 S3 7.5 x10 Solubikly baf, pre wals 7.5x10 Ans