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Deionized water at 10c in which Kw = 2.89e-15 , pkw= 14.539
what is the pH , poH , [OH], [H3O+]?
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- Using paleolimnological methods it is possible to estimate past pH values of surface waters. If the estimate of pH is 5.787 , what is the corresponding PCO2? in atm.The molar concentration of H3O+ ions in the following solutions was measured at 25 °C. Calculate the pH and pOH of the solution: (a) 1.5 x 10-5 mol dm-3 (a sample of rain water), (b) 1.5 mmol dm-3, (c) 5.1 x 10-14 mol dm3, (d) 5.01 x 10-5 mol dm-3 .For biological and medical applications it is often necessary to consider proton transfer equilibria at body temperature (37 °C). The value of Kw for water at body temperature is 2.5 x 10-14 (a) What are the va lue of [H3O+) and the pH of neutral water at 37 °C. (b) What is the molar concentration ofOH- ions and the pOH of neutral water at 37 °C?
- The solution of total volume 0.50 L was prepared by the addition of 0.10 moles of KF to sifficient water. What are the major species of the solution and pH ?Surface water in an open area of the Indian Ocean adjacent to Kenja has an alkalinity 2320 micromoles/liter and a total carbonate concentration of 2.03 x 10^-3 moles/liter. Calculate the concentrations of HCO3- and CO32-, and also the pH of this sea water.Sodium acetate, NaCH3CO2, of mass 7.4 g is used to prepare 250 cm3 of aqueous solution. What is the pH of the solution?
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- Why is rainwater naturally acidic, even in the absence ofpolluting gases such as SO2?Calculate the pH of a 2.00 M Na2CO3 given that the pKa’s of the first and second dissociation of H2CO3 (aq) acid are 6.37 and 10.32, respectively.Soil water with 10^-3 N alkalinity is in equilibrium with a soil gas in which PCO2= 10^-1 atm. If the soil water is pumped from the ground and exposed to air, what will the equilibrium pH be?