Chemistry

posted by .

Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 mL of each of the following buffered solutions:
a. .050 M NH3/.15 M NH4Cl
b. .5 M NH3/ 1.5 M NH4Cl

  • Chemistry -

    millimols NH3 initial = 250 x 0.05 = 12.5
    mm NH4Cl initial = 250 x 0.15 = 37.5
    add 0.01 mol = 10 mmols HCl.

    .......NH3 + HCl ==> NH4Cl
    I......12.5..0.0.....37.5
    add..........10..........
    C.....-10...-10......+10
    E......2.5....0......47.5

    Substitute the E line into Henderson-Hasselbalch equation and solve for pH.
    b is done the same way.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    calculate the equilibrium constant for the reactionas written at 940K. NH4Cl->NH3+HCl delta H= NH4Cl -1779, NH3 -46, HCl -92 delta s= NH4Cl - 682,NH3 192,HCl 187 i don't know how to solve for the equilibrium constant without the …
  2. Chemistry

    Which of the following mixtures will result in the formation of a buffer solution if all solutions are 1.0 M before mixing?
  3. Chemistry

    100 mL of each of the following solutions is mixed; which one of the mixed solutions is a buffer?
  4. Chemistry

    Another Equilibrium Question! The following reaction is at equilibrium in a closed 20.0-L container. At equilibrium, the pressures of NH3 and HCl are both equal to 0.00552 atm, and the mass of NH4Cl (s) is 35.4 g. Calculate the equilibrium …
  5. Chemistry

    Can you check my calculations, please? It's for a lab we did in order to find the the enthalpy of formation of NH4Cl(s). My final answer was -299.4 kJ, while the theoretical, or actual, value is -314.4 kJ. It was the closest value
  6. AP Chem

    Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 mL of each of the following buffered solutions: a. .050 M NH3/.15 M NH4Cl b. .5 M NH3/ 1.5 M NH4Cl
  7. Chemistry

    Which of the following result in buffered solutions when equal volumes of the two solutions are mixed?
  8. Chemistry

    A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with 50 mL of 0.300 NH4Cl. The pKb of NH3 is 4.74. NH3 + H2O-> NH4+ +OH- 7.50 mL of 0.125 M HCl is added to the 100 mL of the buffer solution. Calculate the concentration …
  9. chemistry

    One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction: NH4Cl (s) <=> NH3 (g) +HCl (g) A) calculate Kp of the above system at the temperature of the experiment if the …
  10. plz..chemistry help

    One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction:  NH4Cl (s) <=> NH3 (g) +HCl (g)  A) calculate Kp of the above system at the temperature of the experiment …

More Similar Questions