Question

0)+HO) in acidic solution 7. Balance the following equation the calculate the concentration of FeSO, in mg/l. if aa 25.0 ml sample required 25.0 mL of a 0.02156 M KMnO, for titration to the end point: 8. The iodine liberated by the addition of an excess of KI and HSO, to 25.00 ml. of 0.0255 M KIO, required 20.50 mL of a solution for Na;S,O, for titration using starch as the indicator. What is 9. Calculate the energy in kJ of one mole of red light with a wavelength 653.3 nm. 10. What is the wavelength of the line in the Balmer series in the spectrum of the hydrogen aton with n- 4? 11. Answer both parts: (a) Give orbital notations for electrons in orbitals with the following quantum numbers: (i) n 2,1-0 (ii) n 3.1-1 lii) n-4,1 -2 (b) Give the possible combinations of quantum numbers for the following orbitals to) a 3d orbital (i) a 5p orbital (iii) a 3s orbital 12. Write down the full and shorthand electronic configumtion for each of th ollowing (a) F c) Mn )Cu )Ru (b) K 13. Sketch each of the following orbitals: a) a s orbital;, b) ap, orbital e) ap, orbital da p. orbital d) a dy orbital

please answer 7 - 11

Answer 1

426 -2 +3 6-2 +구 Radh Ha1f +3 Fet Mnou So Balanc eal ern 2. o S31 nfeso 2 peso 2.64s mmole MM (Ae Soy) : S@t 32 + СЧ S2

2. 3 3 20.95625 mele 2- CNo2 02319125 Na2 S203 20 S o 9

2 2 2