Question

Section B: Show all your calculation steps with conversion factors formula of reactants and products, soup with units, calculator value and correct significant figures. Calculation of molar mashuhe shows whes needed. All atomic mass of elements are up to two decimals as given in the periodie table. 1 Following Reaction is given when zinc reacts with sulfur to form Zns. Zn(s) + S() -Zns Determine the limiting reactant when 12.72 g of Zo react with 10.90 g of sulfur (5) produce ZAS? Show all calculation steps by using conversion factors and units. (4 po Srep 1: Mole of ZS from () of Za Step 2: Mole of ZnS from (s) of Limiting reactant is mole of Zes produced is a) Calculate the theoretical yield mass of ZnS formed in the above reaction Show calculation by using conversion factors and units 2 pes) b) If the actual mass of ZnS produced is 14.51 Show Formula and calculation Steps Calculate percent yield of this reacti e s I d has noutralization reaction 1251 - 12.65 mL of sulfuric acid. Calculate molarity 160 M of the a h ca s h Given: 2KOH + HESO. K SO. + 2H2O Step 1: Step 2: Step 3:

Answer 1

2nS 21t S (S (S 66.38 gms et 2n reaus ith 329m of S 12-72-gm et 2n 38 12:72 6.239mofS predud yuen 10 40 9met x32 66-38 Excess reayut Sulphur 2ine Cirnitbng reaseut Imol of 66-38me 2n 97.389m 8f 2mS t2-72 9mot2m 1mol of 2ns 2m 6-38 3 2:00 97. 38 12.72 = 18-949m x97.38 6-33 Theoritial yield t8.949m (a) 2mS (b) Perceud yield = 5 xtoo 766/ 2KOH tH2 SO4 K2 Sout 2H,0 2 0-160 X12.5) H2 1265 11 2 0.160 X12.51 H2 10.079IM 2x 12:6