Tne 13.If the Off ion concentration of a blood sample is 7.5 x 107M. What is the

Question

Tne 13.If the Off ion concentration of a blood sample is 7.5 x 107M. What is the pH of the blood sample? 14. The ionization coivn below endothermic or constant for water is 1.0 x 10-14 at 25°C and 3.8 x 10". at 4 10-14 at 40°C. Is the orwardpronstant for forward processg given below endothermic or exothermic? 11,0t)-= H+(aq) + OH-(aq) n is made by dissolving 18.4 g of HCl in 66 (Assume that the volume remains co remainl in 662 ml. of water. Caleulate the phi of remains constant.) 15. A solution is made by dissol the solution. (Assume that 8 of HCl in 662 mL of water.C

Explanation / Answer

13)

if OH- = 7.5*10^-7

then

pH = ?

given

OH-; its easir to calcualt pOH and then pH

pOH = -log(OH-)

pOH = -log(7.5*10^-7) = 6.124938

pOH = 6.124938

pH = 14 -- pOH = 14-6.124938

pH = 7.875

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