If a piece of Calcite (Calcium Carbonate) is put into the lake, would it dissolve?

If a piece of Calcite (Calcium Carbonate) is put into the lake, would it tend to dissolve? Calcium carbonate solubility is 10^-8.35 M2, and the measured concentration of calcium ion is 0.1mM (millimolar) Information received: Lake pH=4, and total carbonate concentration of 0.001M. Carbonate Equilibria: CO2 + H20 <-> H2CO3 KH= 10^-1.5 mole/(liter.atm) H2CO3 <-> HCO3- + H+ K1= 10^-6.3 mole/lter HCO3- <-> CO3^-2 + H+ K2= 10^ -10.3 mole/liter In a previous question I calculated the concentration of each carbonate species in the lake water, I think they are correct. H2CO3= 10^-5 HCO3-= 5.012 X 10^-8 CO3^-2= 2.512 X 10^-14 I do not not even know where to begin... my che... click for more

calculate the geologic sink and source of As (arsenci) at the lake bottom assuming steady state

calculate the geologic sink and source of As (arsenic) at the lake bottom assuming steady state. Information given: A situation with an industrial input of arsenic directly into the lake at 10kg/Day. The lake volume is 1.2 x 10^8 m^3, and the average depth is 10m. The river velocities are measured as 100 L/min at both the inflow and outflow points. Water samples taken from the rivers show incoming arsenic is 0.02mg/L and the outgoing arsenic is 0.5 mg/L. From the sample, the sedimentation rate in in the lake is estimated to be 200g/m^2 per year. I have solved river gains (3651.05 Kg/yr), and river losses(26.28 Kg/yr.) of arsenic to the lake... but am having difficulty figuring out ... click for more

Word problem involving yields and pH (I need to SEE this problem worked out...then I can do the rest of them!)

How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers? This is the second time that this question has been posted. First response received was incorrect. Hints given: Calculate vol rain, mol H+, mass of S, mass of coal. I need to SEE this problem worked out...then I can do the rest of them!

Word problem involving yields and pH (I need to SEE this problem worked out...then I can do the rest of them!)

This is NOT for OTA 103846 or OTA 103997 (they have already tried this question). How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers? This is the third time that this question has been posted. Two other responses received were incorrect. Please double-check response in light of this as there seems be something tricky about the problem. Hints given: Calculate vol rain, mol H+, mass of S, mass of coal. I need to SEE this problem worked out...then I can do the rest of them!

This is for OTA 104422 Ewen McLaughlin.

Here's another one for you! I use two different tutors at my school, they're both very smart but they always seem to come up with different answers - both of which are wrong! Here it is: A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the pesticide was dumped into a stream with a flow of 10.0 Liters per second moving at 0.7 km/hr. The container leaks pesticide at a constant rate of 5.0 mg/sec. For what distance (in km) downstream is the water contaminated by fatal levels of the pesticide by the time the container is empty?