Suppose you wanted to make a buffer of exactly pHpH 7.00 using KH2PO4KH2PO4 and Na2HPO4Na2HPO4. If the final solution was 0.18 MM in KH2PO4KH2PO4, what concentration of Na2HPO4Na2HPO4 would you need? (pKapKa for H3PO4H3PO4, H2PO4−H2PO4−, and HPO2−4HPO42− are 2.14, 6.86, and 12.40, respectively.)

A)What is the pH of a buffer prepared by adding 0.506 molmol of the weak acid HAHA to 0.507 molmol of NaANaA in 2.00 LL of solution? The dissociation constant KaKa of HAHAis 5.66×10−75.66×10−7. b)What is the pHpH after 0.150 molmol of HClHCl is added to the buffer from Part A? Assume no volume change on the addition of the acid. c).What is the pHpH after 0.195 molmol of NaOHNaOH is added to the buffer from Part A? Assume no volume change on the addition of the base.

For 500.0 mLmL of a buffer solution that is 0.165 M� in CH3CH2NH2CH3CH2NH2 and 0.100 M� in CH3CH2NH3ClCH3CH2NH3Cl, calculate the initial pHpH and the final pHpH after adding 1.8×10−2 molmol of HClHCl. ( Kb(CH3CH2NH2)=5.6×10−4�b(CH3CH2NH2)=5.6×10−4.)   Express your answers using two decimal places separated by a comma.   pHinitial,pHfinal =

What is the pH of a buffer solution made by mixing 50.0 ml of 0.100M potassium hydrogen phthalate with 13.6 ml of 0.100 M NaOH and diuting the miture to 100.0 ml, with water? The Kaz for hydrogen phthalate is 3.1 10-6. O 3.25 O 5.08 O 5.51 O 5.94