equation

  1. Y

    Nernst equation and pH

    How do I calculate the dependence of potential on pH in half-reaction Cu2+ / CuI? As I suspect at pH>7 Cu(OH)2 will dominate and as for pH<7? 6CuI + IO3- + 6H+ = 6Cu2+ + 7I- + 3H2O IO3- / I- 1.08 V Cu2+ / CuI 0,86 V And also, can I calculate the overall potential E0 = E0 ox – E0 red?
  2. L

    Neutralisation question on the equation

    I was just having a look at this reaction and couldn't work out the equation, can anyone help me out? HSO4 + NaOH <--> Na2SO4 + H2O
  3. C

    Chemical Equation for ibuprofen (C13H18O)?

    need this for a school assignment and cant seem to find it. Thanks in advance!
  4. P

    Arrhenius equation help

    Hi all, I am currently working through a problem set and I have been stuck on this question for so long as I don't know where to start: "The activation energy,Ea, for the reaction of OH– with bromoethane to give ethanol is 90 kJmol–1. How much faster will the reaction proceed at 35˚C than at...
  5. M

    Are my oxidation, reduction and balanced equation correct?

    I just want to know if the following makes any sense. If it doesn, what am I doing wrong? Oxidation: Mg(s) → Mg2+(aq) +*2e Reduction: Cu2+(aq) + 2e → Cu(s) Balanced equation: 2 Cu3+(aq) + Mg(s) → 2 Cu(s) + 2 Mg2+(aq) Thanks guys in advance!
  6. M

    Are my oxidation, reduction and balanced equation correct?

    I just want to know if the following makes any sense. If it doesn, what am I doing wrong? Oxidation: Mg(s) → Mg2+(aq) +*2e Reduction: Cu2+(aq) + 2e → Cu(s) Balanced equation: 2 Cu3+(aq) + Mg(s) → 2 Cu(s) + 2 Mg2+(aq) Thanks guys in advance!
  7. C

    Henderson Hasselbalch solubility equation to find s0

    Hi guys, Does anyone know what steps they are following to get a final answer of 1 x 10-6 for s0 ? Any help appreciated Thanks
  8. S

    regarding textbook

    how to read textbook of chemistry
  9. S

    ideal gas equation dilemma please help

    Hi everyone, I'd appreciate some help with this problem (it is driving me crazy) Humpback whales have large lungs (volume of 3600 L). If a whale takes a full breath of air at the surface (pressure= 1.000 atm or 101.3 kPa) and the internal body temperature of the whale is 36.40°C, how many grams...
  10. A

    Writing a chemical equation with polyatomics and acids

    The problems: (NH4)2S + HNO3 = ? - main problem LiHCO3 + HClO = ? - check just in case problem The attempt at a solution: I think it has to equal H2S + NH4NO3 Or H2S + NO2 + H2O I've used multiple online chemical balancing calculators and they all give me different answers. There's also...
  11. A

    Chemical Kinetics: Arrhenius Equation

    Given the same reactant concentrations, the reaction CO (g) + Cl2 (g) ----> COCl2 (g) at 250 degrees C is 1.50 x 10^3 times as fast as the same reaction at 150 degrees C. Calculate the activation energy for this reaction. Assume that the frequency factor is constant. I have been using this...
  12. S

    How can I find out the mass in this equation

    given the thermochemical equation: 2Cu2O(s) ------- 4Cu(s) + O2(g) delta H : +333.8 calculate the mass of copper produced when 1.47 x 10^4 is consumed in the reaction the answer is 11.2 kg BUT HOW ?:confused:
  13. D

    Equation Balancing?

    Can someone please outline a step by step way to balance an equation? I am in the eight grade, but I am solid on nearly everything in high school chemistry excluding this principle of stoichiometry.
  14. F

    How to find the net ionic equation

    Molecular Equation: Pb(OH)2(s) + 2HCl(aq) -> PbCl2(s) + 2H2O(liquid) Total Ionic Equation: Pb(OH)2(s) + 2H(aq) + 2Cl(aq) -> PbCl2(s) + 2H2O(liquid) Net Ionic Equation: ??? Would the net ionic equation be the same as the total ionic equation in this case, since there appear to be no spectator...
  15. E

    PLEASE HELP! total ionic equation

    Bones are mostly calcium phosphate. Calcium chloride reacts with potassium phosphate to form calcium phosphate and potassium chloride. Determine the total IONIC equation for the reaction stated above WITH PHYSICAL STATES
  16. S

    Can some on help me come up with the equation?

    I have determined the values: So, CH4 + 2 O2 = CO2 + 2 H2O & C3H8 +5O2 = 2CO2 +4H2O #mol gases to be = 0.222mol #mol CO2 = 0.391 mol So for step #3How do I write two equations for the moles of CO2 in terms of CH4 and C3H8 ???
  17. R

    Basic Molar Ratio Equation Help Needed

    Need help/explanation... given 1L of 0.5M of both NaClO and NaS2O3, what is the equation for reaction between 5mL NaClO (Sodium Hypochlorite) and 45mL Na2S2O3 (sodium thiosulfate) with depreciating mL values of 5;45, 10;40, 20;30, 30;20, 40;10, 45;5 with each other without the presence of...
  18. C

    can anyone assist me in balancing this equation

    Zn(NO3)2+Sn(NO3)4+C6H8O7=Zn2SnO4+CO+H2O+NO3+O2 ? www.chemicalsubjects.com www.chemicalsubjects.com/forums
  19. H

    DR Equation Balancing Help

    I feel stupid for having to ask for help on this one, but can I please get some assistance? :confused: Balance this DR equation... Ammonium nitrate and lead (IV) oxide I think it is impossible, but I may be wrong.
  20. S

    Redox Equation - Chlorate Ion

    Dear Colleagues, I have been attempting to balance the redox oxidation of the chlorate ion to the perchlorate ion, but I cannot balance it correctly - any help would be appreciated with both balancing the equation and the no of charges on both sides of the equation ( using H and H2O atoms )...