If equal molar amounts of Na2HPO4 and NaJpo4 are mixed in water, calcuate the resulting pH. The pKas of phosphoric acid are 2.1, 7.2, 12.4.
Calculate the % dissociation of a 0.1M solution of weak acid(pKa=5.0)?
Which of the following pairs would makw the best buffer at pH10.0?
a. Acetic acid & sodium acetate
b. NaH2PO4 & Na2HPO4
c. H2CO3 & NaHCO3
d. Methylammonium chloride & Methylamine
Calculate the pH upon diluting 2ml of 2 N HCL to a final volume of 100 ml?
HCl is monoprotic therefore 2 N = 2 M (or mol/L)
Using C1V1 = C2V2 (2 M)(2 mL) = C2 (100 mL)
And C2 = 0.04 M therefore pH = -log (0.04)
pH = 1.4
Calcuate the pH upon addition of 0.0075 mole of solid NaOH to 100 ml of a 0.1 M solution of acetic acid (pKa=4.7)?
Using the fact that acetic acid will completely react with NaOH to produce ...
This solution involves calculating pH upon dilution and addiction and the % dissociation of an acid solution.