What is the maximum water temperature that a lake can have to retain a dissolved oxygen concentration of 0.262 mM?

It's all here.

Convert 0.262 mM to M, then to grams (g = moles/molar mass), then to mg. From the graph read the temperature. It looks like it's between 20 C and 30 C.

To determine the maximum water temperature that a lake can have to retain a dissolved oxygen concentration of 0.262 mM, we need to consider the relationship between temperature and dissolved oxygen solubility.

The solubility of dissolved oxygen in water decreases as temperature increases. This means that as the water temperature increases, the amount of dissolved oxygen that the water can hold decreases.

One way to find the maximum water temperature is to consult a dissolved oxygen solubility chart or table. These charts provide the solubility of oxygen in water at various temperatures.

Here's a step-by-step process to determine the maximum water temperature:

1. Look for a dissolved oxygen solubility chart or table that provides the solubility values at different temperatures. These charts can usually be found in scientific textbooks or online resources.

2. Locate the dissolved oxygen solubility value that corresponds to a concentration of 0.262 mM. This value represents the maximum amount of dissolved oxygen that can be present in the water.

3. Identify the corresponding temperature value in the chart. This temperature represents the maximum water temperature that the lake can have while still maintaining a dissolved oxygen concentration of 0.262 mM.

It's important to note that the maximum water temperature may vary depending on other factors like altitude, atmospheric pressure, and water salinity. So, it's recommended to use a dissolved oxygen solubility chart specific to the conditions of the lake in question for accurate results.