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a- You are being asked to calculate the pH of a drop of pure rainwater at a temperature of 25oC. The total air pressure is 1 atm, and the raindrop is in equilibrium with the atmosphere. You may assume that the CO2 gas is equal to 400 ppmv. In order to get full credit for this problem you must list all unknown species that would exist in the raindrop and all pertinent equations regardless of their level of significance. You must algebraically solve the equations to determine pH.
b- Determine the pH of the raindrop if the CO2 concentration is 600 ppmv and 1,000,000 ppmv.
c- Determine the pH of water in a closed Calcium Carbonate Aquifer. Assume that the temperature is again 25oC, and that the aquifer material is pure Calcium Carbonate. Again you must list all species that exist in the system and all equations.
They each completely penetrate a homogeneous, confined aquifer, and pump at exactly the same rate, 5m^3/day. Prior to pumping, the piezometric head was 30m, the same as the thickness of the aquifer.
design a horizontal curve for a two lane road. The road has 12 ft. lanes. Due to expensive excavation, it was determined that a maximum of 34 ft. can be cleared from the roads centerline towards the inside lane to provide for stopping sight distan..
A weir is to be installed to measure flows in the range of 0.5 to 1.0 m3/sec. If the maximum (total) depth of water that can be accommodated at the weir is 1m and the width of the channel is 4m, determine the crest height of a suppressed weir that sh..
What is the conversion rate for parts per million by volume (ppmv)conversion. How is this converted into atm, Pa, and torr?
a round steel rod, 25 mm in diameter, subjected to a bending moment of 160 Nxm. calculate the maximum bending stress.
A ping-pong ball (diameter = 40mm, weight= .03 N Volume =4piR^3/3) is released from the bottom of a swimming pool. What is the terminal velocity of the ping pong ball in the water
What volume of CO would a 5-mile trip produce after the gas coolsto 25°C (at 1 atm) and per meter of distance traveled, what volume of air could be polluted to the air quality standard of 9ppm
since the management of change is a key elementnbspof a successful process improvement program anbspseries of actions
A 100 lb door has a weight of 100 lbs and a center of gravity at point g. determine the resultant force at points A and B. Point B resists forces in the X and Y directions. Point A resists forces in the X, Y and Z directions. The bottom horizontal ed..
One cubic metre of nitrogen at 40 degrees Celsius and 340KPa is compressed isothermally to .2(m^3). What is the pressure when the nitrogen is reduced to this volume. What is the modulus of elasticity at the beginning and end of the compression.
if a clay slope at a construction site fails derive an equation for the undrained shear strength of the clay given that the shear reistance along L of the slope can be given as: (SuH0)/ sin beta
a temperature probe moves with the velocity 2i+2j-3k through air. the temperature of air changes as T(x,y,z,t)=(2x^2-3y+z^3)cos(at). Find the rate of change of temperature measured by the probe.
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