Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A couple chem questions

  1. Feb 17, 2009 #1
    Which of the following is a redox reaction?
    A. TiCl4(g) + 2 Mg(l) D Ti(s) + 2 MgCl2(l)
    B. NH3(g) + CO2(g) + H2O(l) NH4HCO3(aq)
    C. NaCl(s) + NaHSO4(s) D HCl(g) + Na2SO4(s)
    D. NaOH(aq) + H3PO4(aq) NaH2PO4(aq) + H2O(l)
    E. None of the above

    Is it A?

    Also another q.
    The primary reason for the nonexistence of NaCl2 is that:
    A. Cl has a low electron affinity.
    B. the Cl2
    – ion has been observed only as a ligand in coordination complexes of transition metal ions.
    C. NaCl2 would have very high lattice energy.
    D. the expected repulsion between the Cl atoms is strong.
    E. Na has a high second ionization energy.

    I'm leaning towards E...
  2. jcsd
  3. Feb 17, 2009 #2


    User Avatar

    Staff: Mentor

    I would accept both answers, but that's me.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook