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problems1

# problems1 - How many protons are there in one ml of water...

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Bio 20A-M. Dalbey Supplementary Problems for WATER Lecture 3/29/08 1 of 1 Supplementary Problems for chapter 3 1. The lowest pH ever measured in a water sample from nature is pH = -3.6 (Yes, that is negative 3.6). This value was reported in a study of water draining from an abandoned mine in Northern California (Iron Mountain), and represents a serious environmental problem for the watershed downstream. What is the molar concentration of H + at pH = -3.6? Where the heck could all those protons be coming from? 2. Mono Lake, in eastern California, would more properly be called a “hypersaline inland sea”. It is not only 7 times saltier than the ocean, it also boasts a pH value of 12.
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Unformatted text preview: How many protons are there in one ml of water in Mono Lake? How many hydroxyl ions are there in one ml of water in Mono Lake? 3. The concentration of CO 2 in the atmosphere is increasing due to fossil fuel consumption. A reasonable estimate is that the CO 2 concentration in the atmosphere will approximately double in the next 50 years. Calculations based on equilibrium conditions for the bicarbonate buffering system in seawater suggest that the pH of ocean surface waters will decrease from 8.20 to 7.92 during this time period. By what factor (1 X, 2X, 100 X, etc.) will the molar proton concentration [H+] increase in seawater during this 50 year period?...
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