Instructions: Attempt ALL the questions below & Submit your responses on Thursday, November 03, 2022 for Marking 1. Classify the following ionic compounds as soluble or insoluble; (a) Calcium carbonate (CaCO3) (b) Sodium Phosphate (Na3PO4) (c) Silver sulfate (Ag2SO4) (3mks) 2. Predict what happens when a potassium phosphate solution (K3PO4) is mixed with a calcium nitrate solution [Ca(NO3)2]. Write a net ionic equation for the reaction (2mks) 3. Classify each of the following species in aqueous solution as a Bronsted acid or base; (3mks) a) HBr b) NO₂ c) HCO3 4. Assign oxidation numbers to all the elements in the following compounds and ion: (3mks) a) Li₂O b) HNO3 c) Cr₂O7² 5. Classify the following redox reactions and indicate changes in the oxidation numbers of the elements; (8mks) (i) 2N₂O(g) → 2N2(g) + O2(g) (ii) 6Li(s) + N2(g) - - 2Li;N(S) (iii) Ni(s) + Pb(NO3)2(aq) → Pb(s) + (Ni(NO3)2(aq) 2NO2(g) + H₂O(1)→ HNO2(aq) + HNO3(aq) (iv) 6. How many grams of potassium dichromate (K₂Cr₂O7) are required to prepare a 250ml solution whose concentration is 2.16M? (2mks) 7. In a biochemical assay, a chemist needs to add 3.81 g of glucose to a reaction mixture. Calculate the volume in milliliters of a 2.53M glucose solution she should use for the addition (2mks) 8. Describe how you would prepare 5.00 x 102 mL of a 1.75 M H₂SO4 solution, starting with an 8.61 M stock solution of H₂SO4 (4mks) 9. In a titration experiment, a student finds that 23.48 mL of a NaOH solution are needed to neutralize 0.5468 g of KHP. What is the concentration (in molarity) of the NaOH solution? (3mks) 10. How many milliliters (mL) of a 0.610 M solution are needed to neutralize 20.0 mL of a 0.245 M H₂SO4 solution? (2mks) 11. A 16.42 mL volume of 0.1327 M KMnO4 solution is needed to oxidize 25.00 mL of a FeSO4 solution in an acidic medium. What is the concentration of the FeSO4 solution in molarity? The net equation is (3mks) 5Fe²+ + MnO4 + 8H* → Mn²* + 5Fe³+ + 4H₂O
