What is the pH of a solution made by mixing 500 mL of 1.00 M HCNand 1.50 L of 0.250 M NaOH, and then diluting the entire solutionto a volume of 3.00 L? (Ka HCN = 4.0 x 10-10)
- A.
8.92
B. 6.52
- C.
9.88
- D.
9.27
- E.
5.08
To obtain one litre of a solution of pH = 7, you should dissolvein water
- A.
Two mol of HI + two mol of CH3NH2
- B.
One mol of H2SO4 + two mol ofNH3
- C.
One mol of HF + one mole of KOH
- D.
Two mol of H2SO4 + four mol of NaOH
- E.
Two mol of H3PO4 + three mol ofCa(OH)2
