1. Name or give the chemical formulas (as appropriate) for the following ionic c

Question

1. Name or give the chemical formulas (as appropriate) for the following ionic compounds: a.) Pb(NO3)2 b.) CuSO4 c.) HClO4 d.) magnesium phosphate e.) chromium (III) oxide 2. Predict whether the following compounds will be soluble in water: a.) (NH4)3PO4 b.) ZnCO3 c.) Cu2S3 d.) KCl e.) Hg(NO3)2 3. You titrate 125 mL of a solution of ammonia (NH3) with 1.0 M HClO4. The equivalence point is reached after adding 25 mL of the titrant. a.) What kind of titration was this (WA/SB; WB/SA; SA/SB; polyprotic A (or B) /SB (or SA); WA/WB)? b.) Write a balanced reaction for the titration. c.) What is the concentration of the NH3? d.) Would the resulting solution be acidic, basic, or neutral? 4. Write the Keq expression for the following equilibria: a.) H3PO4 (aq) + H2O (l) H3O + (aq) + H2PO4 - (aq) b.) HCO3 - (aq) + H+ (aq) H2O (l) + H2CO3 (aq) c.) PbSO4 (s) Pb+2 (aq) + SO4 -2 (aq) 5. Name the following organic species (IUPAC is preferred, but I’ll accept common names) and identify what ‘class’ of functional group they have (aldehyde, alkene, ether, etc.) a.) CH3CH2CH2OH b.) c.) d.) e.) 6. You’ve been tasked with disposing of some radioactive waste from the manufacture of medical imaging agents. The main radioactive isotope in this waste is 131I (which has a half-life of ~8.0 days and decays primarily via a - mechanism). There are companies that specialize in the disposal of radioisotopes, but they are very expensive. The local landfill has agreed to allow you to dispose of the waste as long as the radioactivity is below 1 x 10-3 mCi. a.) If the waste originally has an activity of 10 Ci, how long would you have to store the waste to be able to dispose of it in the landfill? (Remember to show your work for full credit) b.) What kind of container should you store the waste in while it’s decaying

Explanation / Answer

1. Chemical formulae for parts a,b and c are already given

d.) magnesium phosphate : Mg3(PO4)2

e.) chromium (III) oxide : Cr2O3

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