Question

1) Give the expected hybridization of the central atom in thefollowing molecules

sulphur in SF6

oxygen in H2O

seleniurn SeO3

phosphorus in PBr5

tellurium in TeF4

2) if we trcat H2O as weak acid , and H2O+ as bronted acid, whatwould be the Equation for their ionization constants (Ka) ?

3) culculate the pH of the 0.25M NH3 \ 0.30M NH4CL buffersystem. what is the pH after the addition of (i) 40ml of 0.15M NaOHand (ii) 30ml of 0.20M HCl to 60ml of thebuffer solution ?

4) circle the molecules with a dipole moment ?

NH3 , CO2 , CHCl3 , CH4 , SO2

5) calculate the percentage ionization of benzoic acid at thefollowing concentration : assume the approximation for both casesto be correct : a) 0.20M b) .0.00020M