Chemistry

d to You hat to prepare 2.000 liters of 0.0500 M Na2S2O3 solution.  Describe exactly what you would do to prepare this solution.  Describe exactly what laboratory balance you would use and what equipment you would need. Show all calculations needed.  SHOW YOUR WORK FOR FULL CREDIT!  YOUR CALCULATIONS MUST HAVE THE CORRECT NUMBER OF SIGNIFICANT FIGURES!

 

Wh   What is the pH of the solution resulting from the mixing of 50.00 mL of 0.10 M NaOH with 100.0 mL of 0.10 M Acetic Acid (CH3CO2H whose pKa is 4.74)? SHOW YOUR WORK FOR FULL CREDIT!!  YOUR ANSWER MUST HAVE THE CORRECT NUMBER OF SIGNIFICANT FIGURES!    

 

25.00 mL of a solution of acetic acid of unknown concentration required exactly 17.20 mL of 0.3570 M NaOH to titrate to a phenolphthalein endpoint.  What is the concentration of the unknown acetic acid solution in moles per liter?

S                         Show YOUR  WORK  FOR  FULL  CREDIT! YOUR ANSWER MUST HAVE THE CORRECT NUMBER OF SIGNIFICANT FIGURES! 

Hydrogen peroxide (H2O2) has a Ka of 2.4 X 10 —12   Calculate the pH of a 0.50 M aqueous solution of hydrogen peroxide at 25 oC.

SHOW YOUR WORK AND ALL UNITS FOR FULL CREDIT!

YOUR ANSWER MUST HAVE THE CORRECT NUMBER OF SIGNIFIGANT FIGURES

 

what is the equation for the ionization of H2O2 in water?

what is the Ka expression for H2O2?

 

 

25.00 mL of a solution of acetic acid of unknown concentration required exactly 17.20 mL of 0.3570 M NaOH to titrate to a phenolphthalein endpoint.  What is the concentration of the unknown acetic acid solution in moles per liter?

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