Rebreathing from a closed bag results in arterial hypercapnia
(raised partial pressure of carbon dioxide), which stimulates
respiration. Briefly explain this neural mechanism.
The partial pressure of argon in the atmosphere is 7.10torr .
Calculate the partial pressure in mmHg and atm . Round each of your
answers to 3 significant digits.
Partial Pressure:
a) Calculate the partial pressure of oxygen and hydrogen in a
mixture of 35.0 g of oxygen gas and 11.5 g of hydrogen gas in a 2.0
L container at 35F?
b) Within a balloon, there are 3 types of gasses. The first gas
is 6 moles in amount, the 2nd is 4 moles and the 3rd is 3.5. If a
total pressure of 10 atm was felt by the balloon and labeled the
1st, 2nd, 3rd gas...
1a/ A mixture of helium and carbon
dioxide gases, at a total pressure of 743
mm Hg, contains 0.397 grams of
helium and 9.33 grams of
carbon dioxide. What is the partial pressure of
each gas in the mixture?
PHe = (......) mm Hg
PCO2 = (......) mm Hg
1b/ A mixture of methane and
xenon gases contains methane at a
partial pressure of 488 mm Hg and
xenon at a partial pressure of
386 mm Hg. What is the...
A mixture of carbon dioxide and nitrogen gases, at a total
pressure of 889 mm Hg, contains 7.17 grams of carbon dioxide and
5.38 grams of nitrogen. What is the partial pressure of each gas in
the mixture?
PCO2 =___(?)___ mm Hg
PN2 = __(?)__ mmHg
pH is a measure of proton activity and not concentration.
(a) Calculate the pH of water (T = 25o C) containing only 10-7 M
H+ , i.e. in ultrapure water.
(b) If the same water also contains 0.36 M NaCl, re-calculate the
pH. Use the Debye-Huckel equation with A = 0.511 as an
approximation to calculate the activity coefficient.
(c) Explain the difference in pH.
What is the pH at 25 ∘C of water saturated with CO2 at a partial
pressure of 1.20 atm ? The Henry's law constant for CO2 at 25 ∘C is
3.1×10−2mol/L-atm. The CO2 is an acidic oxide, reacting with H2O to
form H2CO3.