Why does the charge of pH-dependent charge sites change with…

Why does the charge of pH-dependent charge sites change with pH? How does this affect CEC? Explain in 2 or more sentences plus a hand-drawn diagram. You may draw on paper and take a photo or draw in your preferred app with a touchscreen and take a screenshot. Students with accommodations may use powerpoint (other apps need to be approved in advance). Use the “add file” or “insert image” buttons to upload diagrams. Screenshots of slides are not accepted.

A soil sample plus its cylinder weighed {sd} g dry. The cyli…

A soil sample plus its cylinder weighed {sd} g dry. The cylinder holding the soil has a diameter of {d} cm, a height of {h} cm and a weight of {cy} g. Assume particle density is 2.65g/cm3. Calculate the bulk density of this soil, showing the correct units. Round your answer to the nearest 0.01 (2 decimal places). Show all of your work, including units, by uploading an attachment. When typing out cubic centimeters, use the format cm^3.