CHEM 1110 Midterm: Chemistry 1110 2009 Fall Test 2
Document Summary
Multiple choice (24 pts): clearly indicate the correct answer in the space provided. In the reaction, k2so4 + ba(no3)2 baso4(s) + 2 kno3, which ions are the spectator. 2- ions: ba2+ and so4, ba2+ and k, ba2+ and no3. 2: k+ and so4, k+ and no3. Which is not a strong acid: hbr, hcl, hclo3, hf, hi. Which compound is insoluble in water: kno3, pb(no3)2, na2so4, pbso4, mgcl2. Which set of compounds are all soluble in water: baco3, nabro3, ca(oh)2, and pbcl2, nacl, bacl2, nh4no3, and liclo4, nico3, pbso4, agcl, and mg(oh)2, nacl, agbr, na2co3, and hg2(no3)2, pbcl2, pb(no3)2, agclo4, and hgcl2. Calculations (76 pts): clearly show all work for full credit: (5 pts) how many aluminum atoms are in a 4. 55 g sample of aluminum, (10 pts) a compound contains sodium, boron, and oxygen. An experimental analysis gave values of 53. 976% sodium and 8. 461% boron, by weight; the remainder is oxygen.
