Post a New Question

Chemistry -Please Help

posted by .

2. What is the reduction half-reaction for the following unbalanced redox equation?
Cr2O7^2– + NH4^+ Cr2O3 + N2

A.) Cr2O3 -> Cr2O7^2–
B.) Cr2O7^2– -> Cr2O3
C.) NH4^+ -> N2
D.) N2 -> NH4^+
I think it is B...?

3. Which oxidation-reduction reactions are best balanced by the half-reaction method?

A.) covalent reactions
B.) acid-base reactions
C.) ionic reactions
D.) intermolecular reactions
I think it is C....?

  • Chemistry -Please Help -

    With practice you will learn what oxidizes and what reduces. To help let me give you the oxidation states and you figures these out for yourself.
    Cr is +6 on the left and +3 on the right.
    N is -3 on the left and zero on the right.

    For the second question, AFTER you have balanced the reactions as far as change of electrons is concerned, don't you usually add H^+ (if acid) or OH^-(if base) and water? So what's the answer.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry 2 Ap

    Calculate the masses of Cr2O3, N2, H20 produced from 10.8 g (NH4)2Cr2O7 [ the 2 belongs to the nh4] in an ammonium dichromate volcano reaction. I need to know what the balance equation is, and im having a little trouble with it. Pleasee …
  2. chemistry

    For the balanced equation shown below,how many moles of (NH4)2Cr2O7 reacted, if 0.8353 moles of Cr2O3 are produced?
  3. chemistry

    2. What is the reduction half-reaction for the following unbalanced redox equation?
  4. Chemistry

    2. What is the reduction half-reaction for the following unbalanced redox equation?
  5. Chemistry: check answers

    Please check. Thank you. 2. What is the reduction half-reaction for the following unbalanced redox equation?
  6. Chemistry

    What is the reduction half-reaction for the following unbalanced redox equation?
  7. Chemistry

    What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2*** Cr2O7^-2 - -> Cr^+3
  8. Chemistry

    Which atom has a change in oxidation number of –3 in the following redox reaction?
  9. Chemistry

    What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***
  10. Chemistry

    If 42 mL of Cr2O7-2(aq) solution is titrated to the endpoint with 172 mL of 0.15 M Cl-, what was the concentation of Cr2O7-2 solution?

More Similar Questions

Post a New Question